CN110374113B - Quick support changing method and movable joint suitable for steel pipe support foundation pit - Google Patents
Quick support changing method and movable joint suitable for steel pipe support foundation pit Download PDFInfo
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- CN110374113B CN110374113B CN201910681640.6A CN201910681640A CN110374113B CN 110374113 B CN110374113 B CN 110374113B CN 201910681640 A CN201910681640 A CN 201910681640A CN 110374113 B CN110374113 B CN 110374113B
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- spherical hinge
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- 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
Abstract
The utility model relates to a construction technical field provides a be applicable to steel pipe support foundation ditch and trade fast and prop method and movable joint, movable joint is used for adjusting the direction of supporter, and supplementary foundation ditch trades and props, and the installation is all comparatively simple with the dismantlement, can save the time limit for a project and reduce the construction operation degree of difficulty to can reuse, reduce construction cost, the fast method of propping that trades is applicable to different foundation ditches, and the installation is all simple relatively with the dismantlement process, and modified atress system is more reasonable than traditional atress system, thereby saves the time limit for a project and reduces the operation degree of difficulty of construction, has reduced construction cost, has ensured the safety that the foundation ditch traded and propped. The technical key points of the support changing method mainly comprise the following steps: (1) constructing a vertical structure, and embedding a second type of loose head fixing component; (2) installing a second type of movable head; (3) the middle section is replaced and supported into the underground indoor wall; (4) and supporting the supporting piles and the outer wall.
Description
Technical Field
The application relates to the technical field of building construction, in particular to a quick support changing method and a movable joint suitable for a steel pipe support foundation pit.
Background
The subway station foundation pit has the characteristics that the depth is large, the size in the length direction is far larger than that in the width direction, and the soil pressure mainly comes from the plane where the length direction is located, so that in a plurality of foundation pit supporting types, a supporting mode of a supporting pile and a steel pipe support is often selected, and the steel pipe supports the soil pressure on two sides of a supporting baffle, so that the subway station foundation pit has the obvious characteristics of clear stress, simplicity and convenience in calculation, large rigidity, small deformation and the like. After the excavation of foundation ditch is accomplished, when need be from up building the major structure back down, the steel pipe supports the construction that can hinder the major structure, and because side direction soil pressure is great, can not directly demolish the steel pipe support, so for control supporting structure deformation better, need take certain measure to change the atress system of foundation ditch promptly, trade the support.
The currently collectable support-changing construction scheme, related papers, patents and the like are investigated, and two main support-changing modes are summarized:
firstly, assuming that the underground structure has n layers (n is more than or equal to 1), the support also has n layers. Firstly, completing the construction of the nth layer of foundation bottom plate and the vertical structure; tamping and backfilling a fertilizer groove between the support pile and the outer wall of the basement to the elevation of the bottom plate of the n-1 layer by adopting lime soil in a certain proportion, simultaneously pouring the concrete plate strip with the same thickness between the floor plate of the n-1 layer and the support pile, and alternating a waterproof layer of the outer wall of the basement for construction during backfilling; and finally, removing the support of the steel pipe on the (n-1) th layer, and repeating the steps until the construction of the vertical structure on the (n-1) th layer is completed, and then adopting support replacement construction on the (n-1) th layer. The support changing mode forms a composite stress system through the concrete plate strip, the backfill soil, the second floor of the basement and the outer wall of the basement to resist lateral soil pressure together. The method has the advantages that the steps are simple, no complex cross construction steps are needed, the defect is that the performance of a stress system is excessively dependent on the compactness of the backfill soil, if the compactness of the backfill soil is low, most of the soil pressure is borne by the concrete slab band, the foundation pit is prone to sinking and cracking due to overlarge stress, and further deformation of the foundation pit is caused.
Secondly, after the pouring of the foundation bottom plate of the nth layer and the construction of the vertical structure are completed, tamping and backfilling the fertilizer grooves with lime soil according to a certain proportion; after the fertilizer tank is backfilled, removing the steel pipes at the middle section of the support at the nth layer, and hoisting the steel pipes to the inner wall of the underground chamber at the nth layer by using a crane; by analogy, after the construction of the vertical structure of the (n-1) th layer is finished, the support changing construction of the (n-1) th layer is adopted to support the steel pipe between the inner walls of the basement of the (n-1) th layer. The support changing mode forms a composite stress system through backfilling soil and opposite support of the basement wall and the steel pipe, and the composite stress system resists soil pressure together. Compared with the method I, the method is improved to a certain extent, the stress is more reasonable due to the support of the steel pipes, but the performance of the stress system is also dependent on the compactness of the backfill soil as same as the method I.
Besides the construction method of replacing the support, the existing steel support device has certain improvement space. Typically, a complete steel support consists of a fixed end, an intermediate link and a loose head. The general steel pipe supports the construction, and the installation steel encloses the purlin, and the installation is fixed the end, supports the counterpoint, and the intermediate node is hoisted, and installation is moved the head and is adjusted the headspace for hydraulic jack through the head that moves about, through hydraulic jack application prestressing force, drives into the steel wedge after the prestressing force is stable and fixes. The adjustable head of the device can only be arranged along the longitudinal direction of the steel pipe, the requirement on the accuracy of the position of the middle section is high, and otherwise, the installation is inconvenient.
Disclosure of Invention
The utility model provides an aim at of this application overcomes prior art's is not enough, provides a be applicable to steel pipe support foundation ditch and trades fast and prop method and supporting movable joint, movable joint is used for the direction of adjustment supporter, and supplementary foundation ditch trades and props, and the installation is all comparatively simple with the dismantlement, can save the time limit for a project and reduce the construction operation degree of difficulty to can reuse, reduce construction cost, trade the foundation ditch that props the method and be applicable to various depths fast, construction process is simpler, convenient than traditional method, can effectively shorten the time limit for a project, and trades the atress system that forms after propping more reasonable.
In order to achieve the above object, the present application provides the following technical solutions:
a movable joint suitable for quickly replacing support of a steel pipe support foundation pit comprises two types of movable head fixing components and two types of movable heads.
One side of the first type of movable head fixing component facing the outside is provided with two semicircular holes and two shallow square holes, and a plurality of bolt holes are distributed around the semicircular holes.
The first type of loose head comprises two spherical hinges, two spherical hinge fixing rings and a steel pipe joint. The two spherical hinges are in the same size with the semicircular holes of the first type of loose head fixing components and are rotatably arranged in the semicircular holes, each spherical hinge further comprises a connecting rod extending out, and the middle of each connecting rod is of a partially hollow structure. The spherical hinge fixing ring is sleeved on the connecting rod and fixed with the first type of movable head fixing component through a bolt, so that the spherical hinge can rotate in the semicircular hole. One side of the steel pipe joint is provided with two threaded holes which are matched with the connecting rods of the spherical hinges and used for inserting the connecting rods, so that the spherical hinges can translate along the steel pipe joint; a small section of steel pipe extends out of the other side of the steel pipe joint, and the end part of the steel pipe is provided with a flange plate used for being connected with the steel pipe.
The second type of loose head fixing component is provided with two semicircular holes at one side facing to the outside, and a plurality of bolt holes are distributed around the semicircular holes.
The second type of loose head comprises two spherical hinges, two spherical hinge fixing rings and a steel pipe joint. The two spherical hinges have the same size with the semicircular holes of the second type loose head fixing component, are rotatably arranged in the semicircular holes, and also comprise extended connecting screw rods. The spherical hinge fixing ring is sleeved on the connecting screw rod and is fixed with the second type loose head fixing component through a bolt, and the spherical hinge can rotate in the semicircular hole. One surface of the steel pipe joint is provided with two threaded holes which are matched with the connecting screw rods of the spherical hinges and can screw the spherical hinges into the steel pipe joint; a small section of steel pipe extends out of the other side of the steel pipe joint, and the end part of the steel pipe is provided with a flange plate used for being connected with the steel pipe section.
Further, this application still provides a method suitable for steel pipe supports foundation ditch is fast traded and props, includes:
(1) the construction of vertical structure, pre-buried first type of head fixed component that lives:
after the bottom plate construction is completed, the first-layer vertical structure construction is carried out, the first-type movable head fixing component and the second-type movable head fixing component are symmetrically embedded in the outer side of the first-layer wall body in a pre-embedding mode, the first-layer vertical structure can be bound on the reinforcing steel bars, and then the first-layer vertical structure is poured.
(2) Installing a second type of movable head:
mounting a second type of movable head on the second type of movable head fixing component mounted in the step (1);
the second type of movable joint comprises a spherical base and a steel pipe joint.
The spherical base comprises a spherical hinge and a spherical hinge fixing ring, the spherical hinge extends out of a threaded rod, the spherical hinge is rotatably placed in the semi-spherical hole, and the spherical hinge fixing ring is used for fixing the spherical hinge on the embedded fixing component.
One surface of the steel pipe joint is provided with two threaded holes which are matched with the threaded rods of the spherical hinges; a small section of steel pipe extends out of the other side, and the end part of the steel pipe is provided with a flange.
The installation mode is as follows: screwing the spherical hinge into the steel pipe joint through the threaded rod; and (3) fixing the steel pipe joint and the threaded rod on the second loose head fixing component installed in the step (1) through a spherical hinge fixing ring.
(3) Support changing
And (3) removing the middle section steel pipe, hoisting the middle section steel pipe into the underground chamber through a crane, and supporting the middle section steel pipe between the first-layer inner walls, wherein the supported position is at the same height as the second-type moving head in the step (1).
(4) Supporting the supporting piles and the first-layer outer wall:
and after the middle section is removed, removing the traditional steel support movable joint and the fixed end head, and installing a first movable joint fixing component.
The first type of movable joint comprises a spherical base and a steel pipe joint.
The spherical base comprises a spherical hinge and a spherical hinge fixing ring, the spherical hinge extends out of the connecting rod, the connecting rod is of a partially hollow structure, and the spherical hinge is rotatably placed in a semicircular hole of the fixing component.
One side of the steel pipe joint is provided with two square holes which are matched with the square steel rods of the spherical hinges; a small section of steel pipe extends out of the other side, and the end part of the steel pipe is provided with a flange.
Starting to continue connecting the steel pipes from the second type of movable joint in the step (2), and connecting the steel pipes through the flange plates at the ends; and replacing and supporting the original support between the inner side of the support pile and the outer wall of the basement through the steel pipe.
And (4) replacing the support of each layer and repeating the steps (1) to (4).
This application makes it compare with prior art, has following beneficial effect owing to adopted above-mentioned structure: in actual construction, the steel pipe support has high requirement on steel pipe alignment because one end of the steel pipe support is a fixed head, otherwise, inconvenience is brought to installation, the device is connected with the steel pipe joint through a spherical hinge, so that the joints at two ends can rotate to a certain degree in a plane, and the direction can be regulated through the spherical hinge even if the steel support is aligned to a certain offset, so that installation is completed; the stress system formed after the support is replaced by the method is that the soil body → the steel support between the support pile and the outer wall of the basement → the wall body of the basement → the steel support between the inner wall of the basement, the support can be replaced without depending on backfill, the backfill of the fertilizer tank can be omitted, the support replacement speed is accelerated, and the formed stress system is more reasonable. Generally speaking, the method and the device provided by the application can solve part of defects of the existing steel pipe supporting method, and provide a safe and feasible foundation pit support replacing method.
Drawings
Fig. 1 is a schematic view of a foundation pit structure before support replacement according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a preferred embodiment of the method for quickly replacing a temporary foundation pit according to the embodiment of the present application.
FIG. 3a is a schematic structural diagram of a first type of loose head fixing member provided in the embodiment shown in FIG. 2;
fig. 3b is a schematic structural diagram of a second type of loose head fixing component provided in the embodiment shown in fig. 2;
FIG. 4a is a schematic structural diagram of a first spherical hinge provided in the embodiment shown in FIG. 2;
FIG. 4b is a schematic structural diagram of a second ball hinge provided in the embodiment shown in FIG. 2;
FIG. 4c is a schematic structural view of a first ball-joint fixing ring provided in the embodiment shown in FIG. 2;
FIG. 4d is a schematic structural view of a second ball-joint fixing ring provided in the embodiment shown in FIG. 2;
FIG. 5a is a schematic structural view of a first type of steel pipe joint provided in the embodiment shown in FIG. 2;
FIG. 5b is a schematic structural view of a second type of steel pipe joint provided in the embodiment shown in FIG. 2;
fig. 6 is a schematic structural view of a steel pipe segment provided in the embodiment shown in fig. 2.
Description of the reference numerals
1-1 is a first type of movable head fixing component, 1-1-1 is a first type of movable head fixing component semicircular hole, 1-1-2 is a first type of movable head fixing component threaded hole, and 1-1-3 is a first type of movable head fixing component square hole;
1-2 is a second type loose head fixing component, 1-2-1 is a second type loose head fixing component semicircular hole, and 1-2-2 is a second type loose head fixing component threaded hole;
2-1 is a first-class spherical hinge, 2-1-1 is a first-class spherical hinge square rod, 2-1-2 is a first-class spherical hinge hollow part, 2-1-3 is a first-class spherical hinge fixing ring, and 2-1-3-1 is a first-class spherical hinge fixing ring threaded hole;
2-2 is a second type spherical hinge, 2-2-1 is a second type spherical hinge threaded rod, 2-2-3 is a second type spherical hinge fixing ring, and 2-2-3-1 is a second type spherical hinge fixing ring threaded hole;
3-1 is a first type steel pipe joint, 3-1-1 is a first type steel pipe joint square hole, and 3-1-2 is a first type flange plate;
3-2 is a second type steel pipe joint, 3-2-1 is a second type steel pipe joint threaded hole, and 3-2-2 is a second type flange plate;
4 is a steel pipe segment, and 4-1 is a third type flange;
5 is a steel wedge;
6-1 is a vertical main body structure of the first layer of basement, and 6-2 is a vertical main body structure of the second layer of basement;
7-1 is a first layer basement bottom plate, 7-2 is a second layer basement bottom plate, and 7-3 is a third layer basement bottom plate;
and 8, a support pile.
Detailed Description
The present application will be further described with reference to the accompanying drawings and examples. The advantages and features of the present application will become more apparent in conjunction with the following description. It should be noted that the embodiments of the present application have better practicability, but are not limited to the present application, and the technical features or the combination of the technical features described in the embodiments should not be considered as isolated, and they can be combined with each other to achieve better technical effects. The scope of the preferred embodiments of this application may also include additional implementations, and this should be understood by those skilled in the art to which the embodiments of this application pertain.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
The drawings in the present application are in simplified form and are not to scale, but rather are provided for convenience and clarity in describing the embodiments of the present application and are not intended to limit the scope of the application. Any modification of the structure, change of the ratio or adjustment of the size of the structure should fall within the scope of the technical disclosure of the present application without affecting the effect and the purpose of the present application. And the same reference numerals appearing in the drawings of the present application denote the same features or components, which may be applied to different embodiments. Meanwhile, the terms describing orientation, such as "upper, lower, left, right" and the like, are used for clarity of description only, and are not used for limiting the scope of the application, and the relative relationship changes or adjustments may be considered as the scope of the application without substantial technical changes.
As shown in fig. 1, the steel support base implemented in this example is: the left side is provided with a first-type spherical hinge 2-1, a first-type steel pipe joint 3-1 and a first-type movable joint fixing component 1-1; the right side is provided with a second spherical hinge 2-2, a second steel pipe joint 3-2 and a first movable joint fixing component 1-1.
As shown in figure 2, second loose head fixing members 1-2 are required to be installed on the left and right underground outdoor walls, each second loose head fixing member 1-2 is fixed with two second spherical hinges 2-2, the second spherical hinges 2-2 are connected with second steel pipe joints 3-2, and the second steel pipe joints 3-2 are connected with steel pipe sections 4.
The following describes the order of foundation pit support change and the connection mode of the movable head with reference to fig. 1 to 6:
when the first-layer basement vertical main body structure 6-1 is constructed, the second loose joint fixing components 1-2 are installed on the reinforcing steel bars of the left outer wall and the right outer wall of the first-layer basement vertical main body structure 6-1 in a welding mode, the first-layer basement vertical main body structure 6-1 is poured, and embedding of the second loose joint fixing components 1-2 is completed.
A second ball hinge threaded rod 2-2-1 is installed on a second ball hinge 2-2, a second ball hinge fixing ring 2-2-3 is firstly sleeved on the second ball hinge threaded rod 2-2-1, a second steel pipe joint threaded hole 3-2-1 matched with the second ball hinge threaded rod 2-2-1 is formed in the second steel pipe joint 3-2, and then the two second ball hinges 2-2 are connected with a second steel pipe joint threaded hole 3-2-1 of the second steel pipe joint 3-2 through the second ball hinge threaded rod 2-2-1 in a threaded mode to form a second movable head.
After the strength of the vertical main structure 6-1 of the first-layer basement reaches the standard, the second loose head is connected to a second loose head fixing component 1-2: a second type loose head fixing component semicircular hole 1-2-1 is arranged on a second type loose head fixing component 1-2, a second type spherical hinge 2-2 is firstly placed in the second type loose head fixing component semicircular hole 1-2-1 of the second type loose head fixing component 1-2, a second type spherical hinge fixing ring threaded hole 2-2-3-1 is arranged on a second type spherical hinge fixing ring 2-2-3-1, a second type loose head fixing component threaded hole 1-2-2 is arranged on the periphery of the second type loose head fixing component semicircular hole 1-2-1, and then the second type spherical hinge fixing ring threaded hole 2-2-3-1 and the second type loose head fixing component threaded hole 1-2-2 are connected through bolts, so that the second type spherical hinge 2-2 is fixed in the second type loose head fixing component semicircular hole 1-2-1 .
Dismantling the original support, hoisting the steel pipe segment 4 at the middle part into the inner wall of the vertical main body structure 6-1 of the basement at the first floor by a crane, wherein the height of the steel pipe segment is consistent with the embedding height of the second type loose head fixing member 1-2, and tightly supporting the steel pipe segment 4 in the inner wall by a steel wedge 5; and simultaneously, the support between the support pile 8 and the first-layer basement vertical main structure 6-1 is completed.
A first spherical hinge square rod 2-1-1 is arranged on the first spherical hinge 2-1, a first spherical hinge fixing ring 2-1-3 is sleeved on the first spherical hinge square rod 2-1-1, a first movable head fixing member semi-circular hole 1-1-1 is arranged on the first movable head fixing member 1-1, the first spherical hinge 2-1 is placed in the first movable head fixing member semi-circular hole 1-1-1, a first spherical hinge fixing ring threaded hole 2-1-3-1 is arranged on the first spherical hinge fixing ring 2-1-3, a first movable head fixing member threaded hole 1-1-2 is arranged on the periphery of the first movable head fixing member semi-circular hole 1-1-1, the first spherical hinge fixing ring threaded hole 2-1-3-1 and the first movable head fixing member threaded hole 1-1 are arranged 1-2, adopting bolt connection, fixing a first spherical hinge 2-1 on a first movable head fixing component 1-1, wherein the first spherical hinge 2-1 can rotate in a plane to a certain extent, and the step of the upper complaint is completed in the original steel support, so that a first spherical hinge 2-1 support is not required to be dismounted when the original support is dismounted, and the reinstallation is not required; a second flange 3-2-2 is arranged on the second type steel pipe joint 3-2, a third flange 4-1 is arranged at each of two ends of the steel pipe section 4, and one end of the steel pipe section 4 is connected to the second type steel pipe joint 3-2 through the third flange 4-1 and the second flange 3-2-2; a first-class steel pipe joint square hole 3-1-1 is formed in the first-class steel pipe joint 3-1, the first-class spherical hinge square rod 2-1-1 is inserted into the first-class steel pipe joint square hole 3-1-1, the first-class steel pipe joint 3-1 is connected to the first-class spherical hinge 2-1, the second-class steel pipe joint 3-1 can move along the length direction of the first-class spherical hinge square rod 2-1-1, and after the proper distance is adjusted, the first-class steel pipe joint 3-1 is connected to the other end of the steel pipe section 4 through the first-class flange plate 3-1-2 and the third-class flange plate 4-1.
Two first-class spherical hinge square rods 2-1-1 arranged in parallel are arranged on the first-class spherical hinge 2-1, and a first-class spherical hinge hollow part 2-1-2 is arranged between the two first-class spherical hinge square rods 2-1-1; the first type of adjustable head fixing component square hole 1-1-3 is arranged on the first type of adjustable head fixing component 1-1, the first type of adjustable head fixing component square hole 1-1-3 can be used for placing a jack, the method is consistent with the conventional construction method, and detailed description is not carried out; after the prestress is applied, a steel wedge 5 is driven into the first spherical hinge hollow-out part 2-1-2, and a support between a support pile 8 and a first-layer basement vertical main body structure 6-1 is fixed; and 7-2, pouring a second layer of basement bottom plate, and finishing the first layer of support replacement.
And repeating the steps to finish the support change of the underground layers from bottom to top.
Further, the movable joint suitable for quick support replacement of the steel pipe support foundation pit comprises a first movable joint and a second movable joint;
the first movable joint comprises a first movable joint fixing component 1-1 and a first movable joint, and the first movable joint comprises two first spherical hinges 2-1, two first spherical hinge fixing rings 2-1-3 and a first steel pipe joint 3-1;
one side of the first type of loose head fixing component 1-1 is provided with two first type of loose head fixing component semicircular holes 1-1-1 which are parallel left and right, the periphery of each first type of loose head fixing component semicircular hole 1-1-1 is provided with a plurality of first type of loose head fixing component threaded holes 1-1-2, and two first type of loose head fixing component square holes 1-1-3 which are parallel left and right are arranged between the two first type of loose head fixing component semicircular holes 1-1-1; two first-class spherical hinge square rods 2-1-1 arranged in parallel are arranged on the first-class spherical hinge 2-1, and a first-class spherical hinge hollow part 2-1-2 is arranged between the two first-class spherical hinge square rods 2-1-1; a plurality of first-type spherical hinge fixing ring threaded holes 2-1-3-1 are formed in the first-type spherical hinge fixing ring 2-1-3; one side of the first type steel pipe joint 3-1 is provided with two groups of first type steel pipe joint square holes 3-1-1 which are arranged in parallel left and right, each group of first type steel pipe joint square holes 3-1-1 comprises two first type steel pipe joint square holes 3-1-1 which are arranged in parallel left and right, the first type steel pipe joint square holes 3-1-1 are used for inserting first type spherical hinge square rods 2-1-1, the other side of the first type steel pipe joint 3-1 is provided with a small section of steel pipe, and the tail end of the steel pipe is provided with a first type flange 3-1-2;
the first spherical hinge fixing ring 2-1-3 is sleeved on two first type spherical hinge square rods 2-1-1 which are parallel, the first type spherical hinge 2-1 is arranged in a first type loose head fixing component semicircular hole 1-1-1, the first type loose head fixing component threaded hole 1-1-2 and the first spherical hinge fixing ring threaded hole 2-1-3-1 are connected through a bolt, and the first type spherical hinge square rod 2-1-1 is inserted into the first type steel pipe joint square hole 3-1-1 to form a first movable joint;
the second movable joint comprises a second movable joint fixing component 1-2 and a second movable joint, and the second movable joint comprises two second spherical hinges 2-2, two second spherical hinge fixing rings 2-2-3 and a second steel pipe joint 3-2;
one side of the second type loose head fixing component 1-2 is provided with two second type loose head fixing component semicircular holes 1-2-1 which are parallel left and right, and the periphery of each second type loose head fixing component semicircular hole 1-2-1 is provided with a plurality of first type loose head fixing component threaded holes 1-2-2; a second spherical hinge threaded rod 2-2-1 is arranged on the second spherical hinge 2-2; a plurality of second ball hinge fixing ring threaded holes 2-2-3-1 are formed in the second ball hinge fixing ring 2-2-3; one side of the second type steel pipe joint 3-2 is provided with two second type steel pipe joint threaded holes 3-2-1 which are arranged in parallel left and right, the other side of the second type steel pipe joint is provided with a small section of steel pipe, and the tail end of the steel pipe is provided with a second type flange 3-2-2;
the second ball hinge fixing ring 2-2-3 is sleeved on the second ball hinge threaded rod 2-2-1, the second ball hinge 2-2 is arranged in the second loose head fixing member semicircular hole 1-2-1, the second loose head fixing member threaded hole 1-2-2-2 and the second ball hinge fixing ring threaded hole 2-2-3-1 are connected through a bolt, and the second ball hinge threaded rod 2-2-1 and the second steel pipe joint threaded hole 3-2-1 are in threaded connection to form a second movable joint.
The above description is only illustrative of the preferred embodiments of the present application and is not intended to limit the scope of the present application in any way. Any changes or modifications made by those skilled in the art based on the above disclosure should be considered as equivalent effective embodiments, and all the changes or modifications should fall within the protection scope of the technical solution of the present application.
Claims (1)
1. The utility model provides a movable joint suitable for steel pipe supports foundation ditch is fast trades and is propped which characterized in that: comprises two types of loose head fixing components and two types of loose heads;
one side of the first type of loose head fixing component is provided with two semicircular holes and two shallow square holes, and a plurality of bolt holes are distributed around the semicircular holes;
the first type of loose head comprises two spherical hinges, two spherical hinge fixing rings and a steel pipe joint; the two spherical hinges are rotatably arranged in the semicircular holes of the first type of movable head fixing component; the spherical hinge also comprises a connecting rod extending out, and the middle of the connecting rod is of a partially hollow structure; the spherical hinge fixing ring is sleeved on the connecting rod and is fixed with the first type of movable head fixing component through a bolt; one side of the steel pipe joint is provided with two first-class steel pipe joint square holes matched with the connecting rods of the spherical hinges and used for inserting the connecting rods; a small section of steel pipe extends out of the other side of the steel pipe joint, and the end part of the steel pipe is provided with a flange plate used for connecting with the steel pipe;
one side of the second type of loose head fixing component is provided with two semicircular holes, and a plurality of bolt holes are distributed around the semicircular holes;
the second type of loose head comprises two spherical hinges, two spherical hinge fixing rings and a steel pipe joint; the two spherical hinges are rotatably arranged in the semicircular holes of the second type loose head fixing component; the spherical hinge also comprises a connecting screw rod extending out; the spherical hinge fixing ring is sleeved on the connecting screw rod and is fixed with the second type loose head fixing component through a bolt; one side of the steel pipe joint is provided with two connecting screw threaded holes which are connected with the spherical hinge and used for inserting the connecting screws; a small section of steel pipe extends out of the other side of the steel pipe joint, and the end part of the steel pipe is provided with a flange plate used for being connected with the steel pipe section.
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| CN201910681640.6A CN110374113B (en) | 2019-07-26 | 2019-07-26 | Quick support changing method and movable joint suitable for steel pipe support foundation pit |
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| CN201910681640.6A CN110374113B (en) | 2019-07-26 | 2019-07-26 | Quick support changing method and movable joint suitable for steel pipe support foundation pit |
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| CN110374113B true CN110374113B (en) | 2021-04-09 |
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| CN111441362A (en) * | 2020-03-12 | 2020-07-24 | 中铁六局集团有限公司 | Steel support hydraulic loading and angle adjusting device for irregular foundation pit |
| CN111335796B (en) * | 2020-05-07 | 2021-10-22 | 南通星照人防设备有限公司 | Civil air defense engineering roof plugging device |
| CN115162364B (en) * | 2022-09-07 | 2022-12-09 | 中冶建筑研究总院有限公司 | Foundation pit support steel enclosing purlin, support structure and mounting and dismounting method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH073795A (en) * | 1993-04-07 | 1995-01-06 | Nobuo Oi | Universal joint for civil engineering and architecture land slide protection frame |
| KR100997128B1 (en) * | 2008-05-16 | 2010-11-29 | 김영수 | Screw jack for supporting member |
| CN203144059U (en) * | 2013-04-03 | 2013-08-21 | 上海宏信设备工程有限公司 | Rear-jacking-supporting type adjustable head |
| CN203144060U (en) * | 2013-04-03 | 2013-08-21 | 上海宏信设备工程有限公司 | Rear-jacking-supporting adjustable head system |
| CN107740420A (en) * | 2017-09-15 | 2018-02-27 | 浙江申诚环境工程有限公司 | Foundation ditch tears support and support replacement system and method open |
| CN107653888B (en) * | 2017-09-22 | 2019-08-20 | 山东大学 | A kind of support device and construction method suitable for foundation pit side-wall |
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2019
- 2019-07-26 CN CN201910681640.6A patent/CN110374113B/en active Active
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