CN113338300A - Combined type cross brace structure for foundation pit support - Google Patents
Combined type cross brace structure for foundation pit support Download PDFInfo
- Publication number
- CN113338300A CN113338300A CN202110689535.4A CN202110689535A CN113338300A CN 113338300 A CN113338300 A CN 113338300A CN 202110689535 A CN202110689535 A CN 202110689535A CN 113338300 A CN113338300 A CN 113338300A
- Authority
- CN
- China
- Prior art keywords
- truncated cone
- circular truncated
- foundation pit
- inner support
- cone body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 241000282485 Vulpes vulpes Species 0.000 claims 1
- 235000008954 quail grass Nutrition 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 7
- 238000007906 compression Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Foundations (AREA)
Abstract
The invention relates to a combined type cross brace structure for supporting a foundation pit, wherein an inner support is connected with an underground continuous wall into a whole; one end of each transverse strut is fixed to the side wall of the underground continuous wall of the foundation pit through a connecting and fixing piece, the other end of each transverse strut is provided with an inwards concave structure, when prestress loading is carried out, the circular truncated cone is placed in a space formed by the two oppositely-arranged inwards concave structures through a handle at the top of the circular truncated cone, and the side wall of the circular truncated cone body is matched with the two oppositely-arranged inwards concave structures in shape; a slideway is arranged in the round table body; the clamping head is arranged in the slideway; the clamping head can move up and down along the slideway; a clamping groove is arranged in the middle of the inner support sliding on the two sides of the circular truncated cone; when the circular truncated cone body does not move any more, the clamping heads slide to the positions with the height equal to that of the clamping grooves of the inner supports, the handle is rotated, the circular truncated cone body rotates by 90 degrees, the two clamping heads enter the clamping grooves of the inner supports, and the requirement that the circular truncated cone body and the inner supports on the two sides are fixed into a whole is met.
Description
Technical Field
The invention relates to the technical field of monitoring equipment, in particular to a combined type cross brace structure for foundation pit supporting.
Background
And supporting, reinforcing and protecting measures are adopted for the side wall of the foundation pit and the surrounding environment. The foundation pit support is used as a structural system and needs to meet the requirements of stability and deformation. The foundation pit supporting structure has various forms and can be divided into a cross brace type support, a sheet pile type support, a stress support and the like according to the stress state. Narrow grooves are excavated, and the supporting is in a cross-brace type. In order to determine the conditions of strength, deformation, stability, etc., a test model is usually set up in advance, and simulation calculation is performed on the test model to obtain the actually required conditions of strength, deformation, and stability. In general, in the process of a model test for supporting foundation pit excavation, the aluminum pipe for simulating the inner support cannot apply prestress, which is inconsistent with the inner support applying the prestress in the actual engineering, and a device for monitoring the prestress is not adopted; further optimization of the inner support is therefore required.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a combined type cross brace structure for foundation pit supporting, an inner support of the combined type cross brace structure is connected with an underground continuous wall into a whole, the inner support is of a sectional type structure, the joint of the side surface of a circular truncated cone body and the inner support is provided with a smooth surface, the circular truncated cone body is moved downwards between the two sections of inner supports through a handle, and the inner supports on the two sides are extruded by the circular truncated cone body, so that the application of prestress is realized. The round platform body sets up two slides, and the slide setting is inside the round platform body, and the entity dop of both sides relative position can slide from top to bottom in the slide, the length of two slides equals with the height of round platform body, and the slide runs through along the direction of height of round platform body promptly the round platform body. The two slideways are symmetrically arranged along the circumferential direction of the circular truncated cone body, and the distance between the two slideways is smaller than the diameter of the bottom surface of the circular truncated cone body. The clamping head is arranged in the slideway and can move up and down along the slideway. The slide includes slide first portion and slide second portion, the central line of slide first portion is parallel with the axis of the round platform body, slide second portion and slide first portion intercommunication, the slide second portion is the slot along the whole direction of height of round platform body.
In addition, a clamping groove is arranged in the middle of the inner supports on the two sides of the circular truncated cone body. After the circular truncated cone body does not move any more, the two entity chucks slide to the height position equal to the inner support clamping groove manually, then the handle is rotated to rotate the circular truncated cone body by 90 degrees, the two entity chucks enter the clamping groove of the inner support, the requirement that the circular truncated cone body and the inner supports on the two sides are fixed into a whole is met, and the movement of the position of the circular truncated cone body is avoided.
More recently, a dial device with a spring is arranged between the inner support and the underground diaphragm wall, the inner support extrudes the spring when moving, the moving amount of the spring position can be recorded through the dial, and the magnitude of the prestress applied at the moment can be calculated through the magnitude of the spring stiffness and the displacement amount of the spring.
The magnitude of the prestress is monitored in real time by a dial device with a spring. The loading condition of the prestress can be effectively obtained in time in the model test, and the model test can be efficiently and conveniently completed.
The technical scheme of the invention is as follows:
a combined type cross brace structure for supporting a foundation pit comprises an inner support and a circular truncated cone body; the inner support is connected with the underground continuous wall into a whole; the inner support is a sectional type support and comprises two cross braces which are oppositely arranged, one end part of each cross brace is fixed to the side wall of the underground continuous wall of the foundation pit through a connecting and fixing piece, the other end part of each cross brace is provided with an inwards concave structure which is oppositely arranged, when prestress loading is carried out, the circular truncated cone is placed in a space formed by the two oppositely arranged inwards concave structures through a handle at the top of the circular truncated cone, and the shape of the side wall of the circular truncated cone body is matched with the shape of the two oppositely arranged inwards concave structures; the loading of different prestress is realized by adjusting the relative position of the space formed by the circular truncated cone and the concave structure.
Preferably, the circular truncated cone and the concave structure are in threaded connection.
Preferably, a slideway is arranged inside the circular truncated cone; the clamping head is arranged in the slideway; the clamping head can move up and down along the slideway; a clamping groove is arranged in the middle of the inner support sliding on the two sides of the circular truncated cone; when the circular truncated cone body does not move any more, the clamping heads slide to the positions with the height equal to the clamping grooves of the inner supports, the handle is rotated, the circular truncated cone body rotates by 90 degrees, the two clamping heads enter the clamping grooves of the inner supports, the requirement that the circular truncated cone body and the inner supports on the two sides are fixed into a whole is met, the movement of the position of the circular truncated cone body is avoided, and the loading of prestress is achieved.
Preferably, the slide way is arranged inside the circular truncated cone, and the clamping heads oppositely arranged on two sides can slide up and down in the slide way.
Preferably, the length of the slide way is equal to the height of the circular truncated cone.
Preferably, the distance between the two slide ways is smaller than the diameter of the bottom surface of the circular truncated cone body.
Preferably, the chuck is arranged in the slide way, the slide way comprises a first slide way part and a second slide way part, the central line of the first slide way part is parallel to the axis of the circular truncated cone body, the second slide way part is communicated with the first slide way part, and the second slide way part is a narrow slit along the whole height direction of the circular truncated cone body.
Preferably, the area of the cross section of the bottom of the circular truncated cone body perpendicular to the axis of the circular truncated cone is smaller than the area of the cross section of the top of the circular truncated cone body perpendicular to the axis of the circular truncated cone, and loading of different prestress is achieved along with different pressing depths of the circular truncated cone body.
Preferably, the top of the cone is provided with a handle, which is connected to the top of the cone by a connecting rod, e.g. to the center of the top of the cone.
Preferably, the inner support joint is a smooth surface, and in actual operation, when the handle of the round table body is pressed, the side wall of the round table body rubs against the inner concave surface of the inner support, and the inner round table body moves downwards to press the cross braces on two sides of the inner round table body, so that prestress is applied.
Preferably, the inner support is a hollow structure and has a predetermined wall thickness to ensure sufficient support rigidity.
Furthermore, the combined type cross brace structure for supporting the foundation pit can further comprise a dial and a spring, the belt spring and the dial are arranged between the inner support and the underground continuous wall, the spring is extruded when the inner support moves, the moving amount of the spring position is recorded through the dial, and the magnitude of the prestress applied at the moment is obtained through the magnitude of the rigidity of the spring and the displacement amount of the spring.
The inner support comprises a first cross brace and a second cross brace; the first cross brace and the second cross brace are arranged oppositely, the first end portion of the first cross brace is connected to the side wall of the underground continuous wall through a spring, and the first end portion of the second cross brace is connected to the side wall of the underground continuous wall through a spring. And a gap is formed between the second end of the first transverse support and the second end of the second transverse support, and the circular truncated cone is pressed into the gap to apply prestress to the foundation pit inner support. Along with the difference of the pressing depth of the cone, the loading of different prestress can be realized.
The first end of the spring is connected to the first end of the wale, and the second end of the spring is fixed to the side wall of the underground diaphragm wall through connection.
The calibrated scale is fixed to connecting the mounting, the first end of calibrated scale with be connected mounting fixed connection, the second end of calibrated scale is the free end, the distance is predetermine to having between the second end of calibrated scale and the first end of stull to guarantee that the spring has sufficient compression displacement, avoid the first end of horizontal pole to produce with the second end of calibrated scale and interfere in compression process.
Preferably, the length direction of the dial is parallel to the axial direction of each cross brace.
The lateral wall of the round table body is smooth, the second end of the cross arm is an inclined plane, the inclined plane is a smooth surface, and a clamping groove is formed in the middle position of the inner support arranged on the inclined plane. After the circular truncated cone body does not move any more, the two entity chucks slide to the height position equal to the inner support clamping groove manually, then the handle is rotated to rotate the circular truncated cone body by 90 degrees, the two entity chucks enter the clamping groove of the inner support, the requirement that the circular truncated cone body and the inner supports on the two sides are fixed into a whole is met, and the movement of the position of the circular truncated cone body is avoided.
Preferably, the inner support is a hollow structure and has a predetermined wall thickness to ensure sufficient support rigidity.
The combined type cross brace structure for supporting the foundation pit further comprises a spring and a dial.
Preferably, the number of the springs connecting the wale to the connection fixture is plural, and one of the springs is connected to the connection fixture and the center of the first end of the wale, respectively; all the other springs are uniformly distributed along the axial direction of the connecting and fixing piece respectively, so that the uniform stress is ensured when the cross brace compresses the springs.
Preferably, the number of the dial is plural so that an average displacement amount is obtained by the plural dials.
Compared with the prior art, the invention has the advantages that:
according to the combined type cross brace structure for supporting the foundation pit, the inner support of the device is connected with the underground continuous wall into a whole, the inner support is of a sectional type structure, the joint of the side surface of the circular truncated cone body and the inner support is provided with a smooth surface, the circular truncated cone body is moved downwards between the two sections of inner supports through the handle, and the inner supports on the two sides are extruded by the circular truncated cone body, so that the application of prestress is realized. The round platform body sets up two slides, and the slide setting is inside the round platform body, and the entity dop of both sides relative position can slide from top to bottom in the slide, the length of two slides equals with the height of round platform body, and the slide runs through along the direction of height of round platform body promptly the round platform body. The two slideways are symmetrically arranged along the circumferential direction of the circular truncated cone body, and the distance between the two slideways is smaller than the diameter of the bottom surface of the circular truncated cone body. The clamping head is arranged in the slideway and can move up and down along the slideway. The slide includes slide first portion and slide second portion, the central line of slide first portion is parallel with the axis of the round platform body, slide second portion and slide first portion intercommunication, the slide second portion is the slot along the whole direction of height of round platform body.
In addition, a clamping groove is arranged in the middle of the inner supports on the two sides of the circular truncated cone body. After the circular truncated cone body does not move any more, the two entity chucks slide to the height position equal to the inner support clamping groove manually, then the handle is rotated to rotate the circular truncated cone body by 90 degrees, the two entity chucks enter the clamping groove of the inner support, the requirement that the circular truncated cone body and the inner supports on the two sides are fixed into a whole is met, and the movement of the position of the circular truncated cone body is avoided.
More recently, a dial device with a spring is arranged between the inner support and the underground diaphragm wall, the inner support extrudes the spring when moving, the moving amount of the spring position can be recorded through the dial, and the magnitude of the prestress applied at the moment can be calculated through the magnitude of the spring stiffness and the displacement amount of the spring.
The magnitude of the prestress is monitored in real time by a dial device with a spring. The loading condition of the prestress can be effectively obtained in time in the model test, and the model test can be efficiently and conveniently completed.
Drawings
The advantages of the above and/or additional aspects of the present invention will become apparent and readily appreciated from the following description of the embodiments taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of a combined wale structure for foundation pit support according to an embodiment of the present invention.
Fig. 2 is a second structural schematic diagram of a combined cross brace structure for supporting a foundation pit according to an embodiment of the invention.
Fig. 3 is a first sectional view of a sectional wale structure for supporting a foundation pit according to an embodiment of the present invention.
Fig. 4 is a second sectional view of the sectional wale structure for supporting the foundation pit according to the embodiment of the present invention.
Fig. 5 is a third sectional view of the sectional wale structure for supporting the foundation pit according to the embodiment of the present invention.
Fig. 6 is a fourth sectional view of the sectional wale structure for supporting the foundation pit according to the embodiment of the present invention.
Fig. 7 is a fifth sectional view of the sectional wale structure for supporting the foundation pit according to the embodiment of the present invention.
Fig. 8 is a structural diagram of the combined cross brace structure for supporting a foundation pit, which is provided with a dial structure according to the embodiment of the invention.
Fig. 9 is a schematic structural view of the sectional wale structure for supporting the foundation pit according to the embodiment of the present invention shown in fig. 8, which is provided with a spring.
Fig. 10 is a sectional view of the sectional wale structure for supporting a foundation pit according to the embodiment of the present invention as shown in fig. 8.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
The combined type cross brace structure for supporting the foundation pit as shown in fig. 1 to 10 comprises an inner support, a circular truncated cone body 1, an inner support 2 and an underground continuous wall 3 which are connected into a whole; according to the embodiment of the invention, the inner support is a sectional type support, the inner support comprises two oppositely arranged cross braces, one end part of each cross brace is fixed to the side wall of the underground continuous wall of the foundation pit through a connecting fixing piece, the other end part of each cross brace is arranged to be a concave structure, when prestress loading is carried out, the circular truncated cone is placed in a space formed by the two oppositely arranged concave structures through a handle at the top of the circular truncated cone, and the side wall of the circular truncated cone body is matched with the two oppositely arranged concave structures in shape. Preferably, the joint between the side surface of the circular truncated cone and the inner support is a smooth surface, the circular truncated cone is moved downwards between the two sections of inner supports through the handle, and the circular truncated cone extrudes the inner supports on the two sides to realize the application of prestress. The round platform body sets up two slides, and the slide setting is inside the round platform body, and the entity dop of both sides relative position can slide from top to bottom in the slide, the length of two slides equals with the height of round platform body, and the slide runs through along the direction of height of round platform body promptly the round platform body. The two slideways are symmetrically arranged along the circumferential direction of the circular truncated cone body, and the distance between the two slideways is smaller than the diameter of the bottom surface of the circular truncated cone body. The clamping head 6 is arranged in the slideway 7 and can move up and down along the slideway. The slide includes slide first portion and slide second portion, the central line of slide first portion is parallel with the axis of the round platform body, slide second portion and slide first portion intercommunication, the slide second portion is the slot along the whole direction of height of round platform body.
In addition, a clamping groove 8 is arranged in the middle of the inner supports on the two sides of the circular truncated cone. After the circular truncated cone body does not move any more, two clamping heads, for example, entity clamping heads, are manually slid to the height position equal to the inner support clamping groove, then the handle is rotated to rotate the circular truncated cone body by 90 degrees, the two entity clamping heads enter the clamping groove of the inner support, the requirement that the circular truncated cone body and the inner supports on the two sides are fixed into a whole is met, and the movement of the position of the circular truncated cone body is avoided.
The inner support comprises a first cross brace and a second cross brace; the first cross brace and the second cross brace are arranged oppositely, the first end portion of the first cross brace is connected to the side wall of the underground continuous wall, and the first end portion of the second cross brace is connected to the side wall of the underground continuous wall. And a gap is formed between the second end of the first transverse support and the second end of the second transverse support, and the circular truncated cone is pressed in the gap to apply prestress to the foundation pit inner support. Along with the different pressing depths of the cone, the loading of different prestress is realized.
Preferably, the wales are fixed to the underground diaphragm wall by the connection fixing members 5.
Preferably, the cross-sectional area of the bottom of the truncated cone perpendicular to the axis of the truncated cone is smaller than the cross-sectional area of the top of the truncated cone perpendicular to the axis of the truncated cone, that is, the truncated cone gradually shrinks from top to bottom. The top of the cone is provided with a handle, said handle 4 being connected to the top of the cone by a connecting rod 20, e.g. to the centre of the top of the cone.
The inner supporting joint is an inner concave surface, and in actual operation, the handle 4 of the round table body 1 is pressed, and the round table body moves downwards to extrude the cross braces 2 on two sides of the round table body, so that prestress is applied.
Preferably, the inner support is a hollow structure and has a predetermined wall thickness to ensure sufficient support rigidity.
The connecting fixing piece is of a disc-shaped structure.
According to the embodiment of the present invention, further, as shown in fig. 9 and 10, the combined wale structure for supporting the foundation pit may further include a scale 9 and a spring 10, wherein a band spring and a scale are disposed between the inner support and the underground continuous wall 3, the inner support compresses the spring when moving, the moving amount of the spring position is recorded by the scale, and the magnitude of the prestress applied at the moment is obtained by the magnitude of the spring stiffness and the displacement amount thereof.
The inner support comprises a first cross brace and a second cross brace; the first cross brace and the second cross brace are arranged oppositely, the first end portion of the first cross brace is connected to the side wall of the underground continuous wall through a spring, and the first end portion of the second cross brace is connected to the side wall of the underground continuous wall through a spring. And a gap is formed between the second end of the first transverse support and the second end of the second transverse support, and the circular truncated cone is pressed into the gap to apply prestress to the foundation pit inner support. Along with the difference of the pressing depth of the cone, the loading of different prestress can be realized.
The first end of spring is connected to the first end of stull, and the second end of spring is through connecting the mounting to underground continuous wall's lateral wall.
The calibrated scale is fixed to connecting the mounting, the first end of calibrated scale with be connected mounting fixed connection, the second end of calibrated scale is the free end, the distance is predetermine to having between the second end of calibrated scale and the first end of stull to guarantee that the spring has sufficient compression displacement, avoid the first end of horizontal pole to produce with the second end of calibrated scale and interfere in compression process.
Preferably, the length direction of the dial is parallel to the axial direction of each cross brace.
The lateral wall of the round table body is smooth, the second end of the cross arm is an inclined plane, the inclined plane is a smooth surface, and a clamping groove is formed in the middle position of the inner support arranged on the inclined plane. After the circular truncated cone body does not move any more, the two entity chucks slide to the height position equal to the inner support clamping groove manually, then the handle is rotated to rotate the circular truncated cone body by 90 degrees, the two entity chucks enter the clamping groove of the inner support, the requirement that the circular truncated cone body and the inner supports on the two sides are fixed into a whole is met, and the movement of the position of the circular truncated cone body is avoided.
Preferably, the cross-sectional area of the bottom of the truncated cone perpendicular to the axis of the truncated cone is smaller than the cross-sectional area of the top of the truncated cone perpendicular to the axis of the truncated cone, that is, the truncated cone gradually shrinks from top to bottom. The top of the cone is provided with a handle, said handle 4 being connected to the top of the cone by a connecting rod, e.g. to the centre of the top of the cone.
In actual operation, the handle of the circular truncated cone body is pressed, and the circular truncated cone body moves downwards to squeeze the cross braces on two sides of the circular truncated cone body, so that prestress is applied.
Preferably, the inner support is a hollow structure and has a predetermined wall thickness to ensure sufficient support rigidity.
Preferably, the number of the springs connecting the wale to the connection fixture is plural, and one of the springs is connected to the connection fixture and the center of the first end of the wale, respectively; all the other springs are uniformly distributed along the axial direction of the connecting and fixing piece respectively, so that the uniform stress is ensured when the cross brace compresses the springs.
Preferably, the number of the dial is plural so that an average displacement amount is obtained by the plural dials.
In parallel, when the circular truncated cone and the inner support are in threaded connection, the combined cross brace structure for foundation pit support comprises the inner support, the circular truncated cone, a dial and a spring, wherein the inner support is connected with an underground continuous wall into a whole; a dial with a spring is arranged between the inner support and the underground continuous wall, the circular truncated cone is screwed into a gap of the inner support, the spring is extruded when the inner support moves, the moving amount of the spring position is recorded through the dial, and the magnitude of the prestress applied at the moment is obtained through the magnitude of the rigidity of the spring and the displacement amount of the spring. The inner support comprises a first cross brace and a second cross brace; the first cross brace and the second cross brace are arranged oppositely, the first end portion of the first cross brace is connected to the side wall of the underground continuous wall through a spring, and the first end portion of the second cross brace is connected to the side wall of the underground continuous wall through a spring. And a gap is formed between the second end of the first transverse support and the second end of the second transverse support, and the circular truncated cone is screwed into the gap to apply prestress to the foundation pit inner support. And loading of different prestress is realized along with different screwing depths of the circular truncated cone body. The first end of the spring is connected to the first end of the wale, and the second end of the spring is fixed to the side wall of the underground diaphragm wall through connection. The calibrated scale is fixed to connecting the fixed disk, the first end of calibrated scale and connecting fixed disk fixed connection, the second end of calibrated scale is the free end, it predetermines the distance to have between the second end of calibrated scale and the first end of stull to guarantee that the spring has sufficient compression displacement, avoid the first end of horizontal pole to produce with the second end of calibrated scale and interfere in compression process. Preferably, the length direction of the dial is parallel to the axial direction of each cross brace. The outer side wall of the circular truncated cone body is provided with first threads. The first thread is an external thread. The joint of the inner support is provided with second threads, namely, the second end part of each cross brace is provided with a threaded connection part. Preferably, the cross-sectional area of the bottom of the circular truncated cone perpendicular to the axis of the circular truncated cone is smaller than the cross-sectional area of the top of the circular truncated cone perpendicular to the axis of the circular truncated cone, that is, the circular truncated cone gradually shrinks from the top to the bottom, and the first thread is arranged on the outer side wall of the circular truncated cone. The top of the cone is provided with a swivel handle which is connected to the top of the cone by a connecting rod, e.g. to the centre of the top of the cone. The inner support joint is an inner concave surface, a second thread is arranged on the inner concave surface in color, and the first thread is matched with the second thread. In actual operation, the rotary handle of the rotary cone body is rotated, and the cross braces on two sides of the rotary cone body are downwards moved and extruded through the arranged threads matched with each other, so that prestress is applied. Preferably, the inner support is a hollow structure and has a predetermined wall thickness to ensure sufficient support rigidity. Preferably, the number of the springs connecting the wale to the connection fixing plate is plural, and one of the springs is connected to the connection fixing plate and the center of the first end of the wale, respectively; all the other springs are uniformly distributed along the axial direction of the connecting and fixing disc respectively, so that the uniform stress is ensured when the cross brace compresses the springs.
Preferably, the number of the dial is plural so that an average displacement amount is obtained by the plural dials.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. Those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the communication may be direct, indirect via an intermediate medium, or internal to both elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "at least three" means two or more unless otherwise specified.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A combined type cross brace structure for foundation pit supporting is characterized by comprising an inner support and a circular truncated cone body; the inner support is connected with the underground continuous wall into a whole; the inner support is a sectional type support and comprises two cross braces which are oppositely arranged, one end part of each cross brace is fixed to the side wall of the underground continuous wall of the foundation pit through a connecting and fixing piece, the other end part of each cross brace is provided with an inwards concave structure which is oppositely arranged, when prestress loading is carried out, the circular truncated cone is placed in a space formed by the two oppositely arranged inwards concave structures through a handle at the top of the circular truncated cone, and the shape of the side wall of the circular truncated cone body is matched with the shape of the two oppositely arranged inwards concave structures; the loading of different prestress is realized by adjusting the relative position of the space formed by the circular truncated cone and the concave structure.
2. The modular stull structure for foundation pit support according to claim 1, wherein the truncated cone is threadedly coupled to the recessed structure.
3. The combined wale structure for a foundation pit support according to claim 1, wherein a slide is provided inside the round table body; the clamping head is arranged in the slideway; the clamping head can move up and down along the slideway; a clamping groove is arranged in the middle of the inner support sliding on the two sides of the circular truncated cone; when the circular truncated cone body does not move any more, the clamping heads slide to the positions with the same height as the clamping grooves of the inner supports, the handle is rotated, the circular truncated cone body rotates by 90 degrees, the two clamping heads enter the clamping grooves of the inner supports, the requirement that the circular truncated cone body and the inner supports on the two sides are fixed into a whole is met, the movement of the position of the circular truncated cone body is avoided, and the loading of prestress is achieved;
the slide way is arranged in the circular truncated cone body, and the clamping heads oppositely arranged on two sides can slide up and down in the slide way;
the length of the slide way is equal to the height of the circular truncated cone body.
4. The combined cross-brace structure for the red fox in the foundation pit as claimed in claim 3, wherein the cross-sectional area of the bottom of the truncated cone perpendicular to the axis of the truncated cone is smaller than the cross-sectional area of the top of the truncated cone perpendicular to the axis of the truncated cone, and different pre-stresses are loaded according to different pressing depths of the truncated cone.
5. The modular stull structure for foundation pit support according to claim 4, wherein a handle is provided at the top of the round table body, and the handle is connected to the top of the round table body by a connecting rod.
6. The modular stull structure for foundation pit support according to claim 5, wherein the inner concave surface at the inner support joint is a smooth surface.
7. The modular wale structure for foundation pit support according to claim 6, wherein the inner support is a hollow structure and has a predetermined wall thickness to ensure sufficient support rigidity.
8. A modular stull structure for foundation pit support as claimed in claim 7, further comprising a spring and a dial.
9. The modular wale structure for foundation pit support according to claim 8, wherein the number of the springs connecting the wale to the connection fixture is plural, and one of the springs is connected to the connection fixture and a center of the first end of the wale, respectively; all the other springs are uniformly distributed along the axial direction of the connecting and fixing piece respectively, so that the uniform stress is ensured when the cross brace compresses the springs.
10. A modular wale structure for foundation pit support according to claim 9, wherein the number of the scales is plural so that an average displacement amount is obtained by the plural scales.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110689535.4A CN113338300A (en) | 2021-06-22 | 2021-06-22 | Combined type cross brace structure for foundation pit support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110689535.4A CN113338300A (en) | 2021-06-22 | 2021-06-22 | Combined type cross brace structure for foundation pit support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113338300A true CN113338300A (en) | 2021-09-03 |
Family
ID=77478700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110689535.4A Pending CN113338300A (en) | 2021-06-22 | 2021-06-22 | Combined type cross brace structure for foundation pit support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113338300A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2050164U (en) * | 1989-04-24 | 1989-12-27 | 浙江省建筑科学研究所 | Fully-machinery direct-reading steel wire stretch-draw force testing instrument |
| CN103290851A (en) * | 2013-06-28 | 2013-09-11 | 上海强劲地基工程股份有限公司 | Prestressed steel support used for controlling internal and external differential displacement of foundation pit enclosure wall and construction method |
| CN207436070U (en) * | 2017-11-20 | 2018-06-01 | 卓成建设集团有限公司 | A kind of deep foundation pit supporting structure |
| CN207609429U (en) * | 2017-12-12 | 2018-07-13 | 中铁十二局集团第二工程有限公司 | A kind of prestressing force false stull |
| CN110565652A (en) * | 2019-09-30 | 2019-12-13 | 中铁第四勘察设计院集团有限公司 | telescopic steel pipe cross brace structure for long and narrow foundation pit and support changing method |
| CN209837045U (en) * | 2019-04-16 | 2019-12-24 | 江苏鸿基节能新技术股份有限公司 | Supporting and reinforcing structure of deep foundation pit |
| CN210104816U (en) * | 2019-04-18 | 2020-02-21 | 福州铁建建筑有限公司 | Inner support simulation device of foundation pit supporting structure model |
| CN111236163A (en) * | 2020-03-02 | 2020-06-05 | 宁夏大学 | Multistage sediment trapping device that soil and water kept |
| CN212865950U (en) * | 2020-06-01 | 2021-04-02 | 浙江湖州市建工集团有限公司 | Connecting piece for foundation pit support |
| AU2021104484A4 (en) * | 2021-07-23 | 2021-09-16 | Guangdong Foundation Engineering Group Co., Ltd. | Reusable assembled adjustable guide wall inner support frame, and applied construction method thereof |
-
2021
- 2021-06-22 CN CN202110689535.4A patent/CN113338300A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2050164U (en) * | 1989-04-24 | 1989-12-27 | 浙江省建筑科学研究所 | Fully-machinery direct-reading steel wire stretch-draw force testing instrument |
| CN103290851A (en) * | 2013-06-28 | 2013-09-11 | 上海强劲地基工程股份有限公司 | Prestressed steel support used for controlling internal and external differential displacement of foundation pit enclosure wall and construction method |
| CN207436070U (en) * | 2017-11-20 | 2018-06-01 | 卓成建设集团有限公司 | A kind of deep foundation pit supporting structure |
| CN207609429U (en) * | 2017-12-12 | 2018-07-13 | 中铁十二局集团第二工程有限公司 | A kind of prestressing force false stull |
| CN209837045U (en) * | 2019-04-16 | 2019-12-24 | 江苏鸿基节能新技术股份有限公司 | Supporting and reinforcing structure of deep foundation pit |
| CN210104816U (en) * | 2019-04-18 | 2020-02-21 | 福州铁建建筑有限公司 | Inner support simulation device of foundation pit supporting structure model |
| CN110565652A (en) * | 2019-09-30 | 2019-12-13 | 中铁第四勘察设计院集团有限公司 | telescopic steel pipe cross brace structure for long and narrow foundation pit and support changing method |
| CN111236163A (en) * | 2020-03-02 | 2020-06-05 | 宁夏大学 | Multistage sediment trapping device that soil and water kept |
| CN212865950U (en) * | 2020-06-01 | 2021-04-02 | 浙江湖州市建工集团有限公司 | Connecting piece for foundation pit support |
| AU2021104484A4 (en) * | 2021-07-23 | 2021-09-16 | Guangdong Foundation Engineering Group Co., Ltd. | Reusable assembled adjustable guide wall inner support frame, and applied construction method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10823652B2 (en) | Triaxial high temperature and high pressure rock mechanics load test platform | |
| CN113338300A (en) | Combined type cross brace structure for foundation pit support | |
| CN213745905U (en) | Monitoring device for overhauling | |
| US20230122591A1 (en) | Clamping device and machining method | |
| CN210335712U (en) | Novel eccentric casting part machining device | |
| CN215562855U (en) | Support prestressing force applying device in foundation ditch with prestressing force monitoring structure | |
| CN115341751B (en) | Intelligent climbing formwork supporting device and method with bidirectional deviation self-regulation | |
| CN107838571B (en) | Welding device and welding method for slender thin-wall hollow shaft | |
| CN114382430B (en) | Downhole tool releaser for oil extraction | |
| CN210981082U (en) | Device for measuring displacement distance of retaining wall | |
| CN215060953U (en) | Portable measuring tool is used in building engineering construction | |
| CN112872852B (en) | Processing tool equipment of clutch friction disc | |
| CN214580192U (en) | Anti-seismic precision surveying and mapping device | |
| CN211622595U (en) | Support frame for building | |
| CN208516760U (en) | A kind of boom hoisting of cast iron surface plate | |
| CN212343291U (en) | Composite material cable support for electric pipe well | |
| CN210151695U (en) | Be used for marine construction jacket levelling device | |
| CN220448140U (en) | Machining tool for hanging frame device of unmanned helicopter | |
| CN209458628U (en) | Aluminium die casting servo shell and its cubing | |
| CN220945093U (en) | Positioning device for extrusion cylinder assembly | |
| CN212858607U (en) | Adjustable clamp for jacking production | |
| CN220322890U (en) | Remolded soil sample preparation device for ring shear test | |
| CN215331677U (en) | Support system with high-precision jacking device | |
| CN215717385U (en) | Bolt mounting and positioning device for steel structure upright post | |
| CN209873899U (en) | Static load experimental facilities places box with fixed function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210903 |