CN217150257U - Octagonal working pit supporting member - Google Patents
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- CN217150257U CN217150257U CN202121430323.6U CN202121430323U CN217150257U CN 217150257 U CN217150257 U CN 217150257U CN 202121430323 U CN202121430323 U CN 202121430323U CN 217150257 U CN217150257 U CN 217150257U
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Abstract
The utility model discloses an octagonal working pit supporting member, which comprises an octagonal working pit retaining wall supporting member formed by butt joint, wherein a frame-shaped plate and a straight plate are connected through symmetrically distributed H-shaped steel crossbars; the working pit retaining wall comprises an inner layer steel plate and an outer layer steel plate which are provided with steel plate stiffening ribs, and the bottom of the working pit retaining wall is provided with an interlayer connecting piece connected with the adjacent interlayer working pit retaining wall; the H-shaped steel cross braces are connected with the retaining walls of the working pits, the adjacent octagonal supporting members are connected through the interlayer connecting pieces, the layer-by-layer excavation of the working pits of the pipe jacking or directional drilling is implemented, and the octagonal supporting members after excavation are reversely disassembled and recovered. The supporting structure of the working pit can be excavated downwards from the ground layer by layer, and supporting members are recycled in a reverse layer manner, so that waste is reduced, accident risks such as difficult settlement, sudden settlement and partial settlement in construction are avoided, and the supporting structure has the advantages of being capable of being repeatedly used, saving space, reducing cost, reducing energy consumption and being green and environment-friendly.
Description
Technical Field
The utility model relates to a city construction engineering technical field specifically is when city municipal pipeline adopts push pipe and directional drilling construction, octagonal work hole supporting component.
Background
Along with the development and construction of cities, the construction scale and the types of various municipal infrastructure supporting pipelines, other underground structures and facilities in the cities and the underground structures are increased to different degrees, and the overground buildings are increased day by day, so that the underground spaces of the cities are short. Meanwhile, the reasons of urban traffic dispersion caused by the fact that a construction site occupies the existing traffic space, protection of underground and overground existing pipelines and structures and the like are considered, and when the pipeline construction matched with other municipal foundations newly built in later period is carried out, the construction space is often limited to different degrees, so that the non-grooving construction becomes a preferred mode of various pipeline construction when the construction space is limited, and particularly pipe-jacking construction, directional drilling construction and the like are adopted.
When the urban underground pipeline is subjected to pipe jacking or directional drilling construction, working pits including a pushing working pit and a receiving working pit are required to be arranged according to the construction requirements. Due to the limitation of construction sites and other existing pipelines, underground and overground structures, the working pit needs to adopt a safe and reliable supporting mode, and the smooth proceeding of pipe-jacking construction is guaranteed.
According to the construction condition of laying urban underground pipelines at present, the common methods of the working pit supporting forms of pipe jacking construction (or directional drilling construction) include reinforced concrete dado (reverse construction method construction), reinforced concrete open caisson and the like, and the supporting forms have the following defects:
1. the reverse construction method of the reinforced concrete retaining wall is characterized in that a layer (the depth is not more than 2m) is excavated downwards from the ground to support a layer, the working procedures are complex (the working procedures of formwork support, pouring, maintenance, formwork removal and the like), and the construction period is long.
2. The open caisson is formed by casting in situ (a barrel body), earth is excavated and transported from a shaft in a layering way, so that the open caisson gradually sinks under the action of self weight, and bottom sealing is carried out after a preset design elevation is reached.
3. The reinforced concrete structure supported by the working pit can be used only once, so that the investment cost of the project is increased invisibly, and the resource waste is caused.
4. After the construction of the working pit supporting structure is completed, only a reinforced concrete structure within a range of 3.5m from the ground is broken, and the rest parts exist in the ground permanently, so that unnecessary waste is caused to urban underground space, the natural environment is influenced, and the construction space of subsequent underground pipelines is occupied.
In view of the above circumstances, it is necessary to develop a new type of working pit supporting form and construction process, which are the indispensable way for the development and construction of the current urban basic pipeline construction.
SUMMERY OF THE UTILITY MODEL
In order to solve the above-mentioned defects existing in the prior art, an object of the utility model is to provide an octagon work hole is strutted prefabricated component of assembling. The supporting structure of the working pit can be excavated downwards from the ground layer by layer, and supporting members are recycled in a reverse layer manner, so that waste is reduced, accident risks such as difficult settlement, sudden settlement and partial settlement in construction are avoided, and the supporting structure has the advantages of being capable of being repeatedly used, saving space, reducing cost, reducing energy consumption and being green and environment-friendly.
The utility model discloses a realize through following technical scheme.
An octagonal working pit supporting component comprises a surrounding frame-shaped working pit protecting wall, wherein the surrounding frame-shaped working pit protecting wall is formed by butting a frame-shaped plate and a straight plate, and the frame-shaped plate and the straight plate are connected through symmetrically distributed H-shaped steel cross braces; the working pit retaining wall comprises an inner layer steel plate and an outer layer steel plate, a steel plate stiffening rib is arranged between the inner layer steel plate and the outer layer steel plate, and a connecting piece connected with the working pit retaining wall between adjacent layers is arranged at the bottom of the working pit retaining wall.
The H-shaped steel cross braces are connected with the retaining walls of the working pits, the adjacent octagonal supporting members are connected through the interlayer connecting pieces, the layer-by-layer excavation of the working pits of the pipe jacking or directional drilling is implemented, and the octagonal supporting members after excavation are reversely disassembled and recovered.
As an improvement, the steel plate stiffening ribs are arranged at equal intervals along the inner layer steel plate and the outer layer steel plate of the protective wall of the working pit.
As an improvement, the steel plate stiffening rib comprises a vertical plate and two horizontal reinforcing bars connected between the vertical plate and the vertical plate, and the vertical plate is welded along the inner steel plate wall and the outer steel plate wall of the working pit retaining wall at 90 degrees; two horizontal reinforcing bars are welded along the inner and outer steel plate walls of the protecting wall of the working pit respectively.
As an improvement, the steel plate stiffening ribs are vertical frame-shaped plates, and flanges at two ends of each frame-shaped plate are welded with the inner steel plate wall and the outer steel plate wall of the protecting wall of the working pit.
As an improvement, the frame-shaped plates and the straight plates are butted to form an octagonal supporting member, the butting surface forms an inclination angle of 45 degrees, and the inclination directions of all the contact surfaces are the same; a rubber water stop belt or a rubber abrasion pad is padded between the butt joint surfaces.
As an improvement, the outer surfaces of the inner steel plate and the outer steel plate of the working pit protecting wall are corrugated.
As an improvement, the H-shaped steel cross braces are tied between the four sides of the octagonal supporting component and the corner cutting component, at least four pairs of the H-shaped steel cross braces are symmetrically distributed along the octagonal retaining wall of the working pit, and the H-shaped steel cross braces are in hanging connection or in threaded connection.
As an improvement, at least one pair of H-shaped steel cross braces are tied between the long sides of the octagonal supporting members and the corner cutting members, and at least one other pair of H-shaped steel cross braces are tied between the long sides and the short sides of the octagonal supporting members.
As an improvement, a stiffening brace is further connected to the H-shaped steel cross brace pulled between the long side and the short side, the stiffening brace is a connecting ring welded along the middle of the H-shaped steel cross brace, a pair of stiffening braces is horizontally buckled on the connecting ring, and the other end of each stiffening brace is connected between the long side and the short side of the inner wall of the working pit retaining wall respectively and forms a cross structure with the H-shaped steel cross brace.
The utility model discloses owing to take above technical scheme, it has following beneficial effect:
1. the supporting structure adopts finished components, the construction is safe and reliable, the operation process is simple, the volume and the weight are relatively small, and the transportation and the installation are convenient.
2. The overlooking shape of the supporting structure adopts an octagon, so that the supporting structure is good in stress condition relative to a rectangle, stable in structure and convenient to disassemble.
3. Supporting construction adopts the box structure cross-section of inside and outside double-walled, compares in the structure of only establishing outer wallboard and stiffening rib, is favorable to improving structural rigidity, non-deformable, and is safer, durable more, and the outward appearance is level and smooth, unified.
4. The supporting member is easy to install, assemble on site and disassemble after construction, can be repeatedly used and is beneficial to walking a sustainable development way; the construction period is shortened, the production efficiency is improved, and adverse effects on urban traffic and resident life are reduced.
5. The supporting structure adopts finished components, is managed and maintained in a centralized way, does not produce pollutants, saves energy, reduces emission and protects the environment.
6. The supporting structure is completely dismantled after construction, so that the energy conservation, emission reduction and environmental protection are facilitated, the underground space is not left after the construction of the supporting member, and compared with the traditional reinforced concrete supporting structure, the underground space is facilitated to be saved, and the laying space of subsequent municipal supporting pipelines is not influenced.
7. The supporting structure adopts a steel (or composite material) component, improves the production efficiency, has advanced technology, saves resources and energy, and is beneficial to the development of national economy.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, do not constitute a limitation of the invention, and in which:
FIGS. 1(a), (b) are schematic structural views of a work pit supporting member;
figure 2 is a schematic view of a section a-a of the working pit bracing member;
FIGS. 3(a) and (b) are sectional plan views of the retaining wall of the retaining member for the working pit;
figure 4 is a sectional view of a retaining wall of a work pit retaining member;
FIG. 5 is an elevation view of a section of the working pit supporting member specially prepared for the opening;
figure 6 is a cross-sectional view of a hole detail section of a work pit bracing member.
In the figure: 1-working pit dado, 2-steel sheet stiffening rib, 3-H shaped steel stull, 4-interlayer connecting piece, 5-45 contact surface, 6-vertical interlayer contact surface, 7-lower inner arc framework, 8-upper inner arc framework, 9-push pipe business turn over, go out the entrance to the cave.
Detailed Description
The invention will be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions are provided to explain the invention, but not to limit the invention.
As shown in fig. 1(a) and (b), the octagonal supporting member for the working pit comprises a frame-shaped working pit protecting wall 1, wherein the working pit protecting wall 1 is formed by welding an inner layer steel plate and an outer layer steel plate through steel plate stiffening ribs 2, and a plurality of steel plate stiffening ribs 2 are arranged at equal intervals along the inner layer steel plate and the outer layer steel plate of the working pit protecting wall 1.
In one embodiment, the steel plate stiffener 2 comprises a vertical plate and two horizontal stiffening rods connected between the vertical plate, and is uniformly stressed and structurally firm. The vertical plate is welded along the inner and outer steel plate walls of the working pit retaining wall 1 at 90 degrees; two horizontal reinforcing bars are respectively welded along the inner steel plate wall and the outer steel plate wall of the protective wall 1 of the working pit.
In another embodiment, the steel plate stiffening rib 2 is a vertical frame-shaped plate, and flanges at two ends of the frame-shaped plate are respectively welded with the inner steel plate wall and the outer steel plate wall of the protective wall of the working pit.
The frame-shaped working pit protecting wall 1 is a rectangle with four corners cut off, an octagonal structure is formed, a butt joint structure is arranged between the four sides of the octagon and corner cutting members, the butt joint surface is a 45-degree contact surface 5, and a rubber abrasion pad is additionally arranged on the butt joint surface. The inclined directions of the 45-degree contact surfaces 5 are the same, so that the assembling and the disassembling are convenient. H-shaped steel cross braces 3 are tied between the four sides of the octagon and the corner cutting members, and the H-shaped steel cross braces 3 are symmetrically distributed along the octagonal working pit protecting wall 1, so that the whole stress is uniform, and the device is safe and reliable.
As shown in fig. 2 and 4, the working pit retaining wall 1 has multiple layers, and the vertical plates of the steel plate stiffeners 2 between the inner wall and the outer wall of each layer of the working pit retaining wall 1 are of a multi-block up-down butt joint structure. The upper end and the lower end of the inner wall of each layer of the working pit retaining wall 1 are provided with interlayer connecting pieces 4 (clamps, fasteners or bolts), and a rubber abrasion pad is additionally arranged on a vertical interlayer contact surface 6 between the working pit retaining walls 1.
The octagonal working pit protecting wall 1 is divided into blocks in a layered mode, cast or steel (or composite materials such as aluminum alloy, steel strip polyethylene, polypropylene and the like) components are adopted, and the octagonal working pit protecting wall is suitable for working pits with the width of 4-8 m and the length of 4-9.5 m; the height of each layer is 1.5m and 2m (the opening section is specially made, the height is 3m and 4m), and at least more than 4 layers (the total depth is not less than 6 m); each layer is divided into at least 4 blocks (or 4 sections).
The wall thickness of the octagonal working pit protecting wall 1 is 200-300 mm, and the inner wall and the outer wall of each component are welded by steel plate stiffening ribs; the horizontal inclination angle of each layer of 2 adjacent contact surfaces is 45 degrees, and the vertical distance between the two contact surfaces is not less than 1m by adopting the connection points of the H-shaped steel cross braces 3; the upper layer and the lower layer are connected by a hoop and a fastener (or a bolt), the hoop and the fastener (or the bolt) are uniformly arranged on each component, and the upper layer and the lower layer are matched with each other.
Rubber abrasion pads with the thickness of 10 mm-20 mm are additionally arranged between the horizontal direction (45-degree contact surface) and the vertical direction of the octagonal working pit supporting member, so that the octagonal working pit supporting member is convenient to mount and dismount, the collision and abrasion between the members can be reduced, and the service life of the members is prolonged.
As shown in fig. 1(a), fig. 2, fig. 3(a), for the utility model discloses a small-size octagon work hole supporting component, the symmetry is drawed between the long limit of work hole dado 1 inner wall and the corner cut component and is tied together there is H shaped steel stull 3, is equipped with two pairs of H shaped steel stulls 3 in every layer of work hole dado 1, and H shaped steel stull distributes from top to bottom for hanging or threaded connection, at every layer of work hole dado 1 inner wall.
As shown in fig. 1(b), fig. 2, and fig. 3(b), for the large-scale octagonal retaining member for work pit of the present invention, H-shaped steel crossbars 3 are tied between the long sides and the short sides of the inner wall of the retaining wall 1 for work pit, two pairs of H-shaped steel crossbars 3 are provided in each layer of retaining wall 1 for work pit, and the inner wall of each layer of retaining wall 1 for work pit is distributed up and down. Further draw to tie on one of them pair of diagonal distribution's H shaped steel stull 3 and have the stiffening brace, the stiffening brace is for following 3 middle part welding go-between of H shaped steel stull, and a pair of stiffening brace level lock joint is on the go-between, and the other end is connected respectively between the long limit and the minor face of 1 inner wall of work hole dado, forms cross structure with H shaped steel stull 3 to make structure relatively stable, safe and reliable.
The H-shaped steel cross braces 3 connect the octagonal working pit retaining walls 1 which are butted in a partitioning mode into a whole, and the multiple layers of working pit retaining walls 1 are connected through fasteners or bolts 4 to form the working pit retaining walls 1 with the multiple layers of structures.
As shown in fig. 5 and 6, the utility model discloses work pit dado 1 is applied to various pipeline push pipes or directional drilling construction, and the pipeline push pipe that is under the directional drilling construction advances, goes out the entrance to the cave 9 (pipeline laying direction) and adopts casting or steel component independent manufacturing, sets up inner arc framework 7 on the entrance to the cave 9 upper portion of push pipe, goes out the entrance to the cave, sets up inner arc framework 8 in the lower part of push pipe, and this mode is favorable to installing, dismantling; the total height is 3m and 4m, and the wall thickness is 300 mm. The opening of the directional drill is reserved on the supporting member directly.
The utility model discloses in, octagon work hole support component adopts the steel component, and every layer divide into 4 pieces (or 4 sections) at least, and wall thickness 200 ~ 300 mm. The inner wall and the outer wall of each component are welded by steel plate stiffening ribs; the horizontal inclination angle of each layer of 2 adjacent contact surfaces is 45 degrees, the two contact surfaces are connected by an H-shaped steel cross brace, and the vertical distance between the connection points is not less than 1 m; the upper layer and the lower layer are connected by a hoop and a fastener (or a bolt), the hoop and the fastener (or the bolt) are uniformly arranged on each component, and the upper layer and the lower layer are matched with each other.
The octagonal supporting member of the working pit is made of composite materials (such as steel band polyethylene, steel band polypropylene and the like), and the inner surface and the outer surface of the working pit retaining wall 1 are corrugated, so that the supporting member of the working pit is good in stress condition during construction. The ring stiffness is not less than 16-25 kN/m 2 (i.e., SN 16-SN 25) or Cychen-A class execution. Each layer is divided into at least 4 blocks (or 4 sections), and the maximum distance between the inner peak top and the outer peak top (namely the wall thickness) is 200-300 mm. The connection mode between the supporting member blocks and the supporting member layers of the working pit are the same as those of the steel member.
The opening (pipeline laying direction) of the octagonal working pit supporting pipe jacking is manufactured by casting or steel members independently, the upper part and the lower part of the octagonal working pit supporting pipe jacking are of inner arc structures, the octagonal working pit supporting pipe jacking is beneficial to installation and disassembly, the total height is 3m and 4m, and the wall thickness is 300 mm; the opening of the directional drill is reserved on the supporting member directly.
Rubber abrasion pads with the thickness of 10 mm-20 mm are additionally arranged between the horizontal direction (45-degree contact surface) and the vertical direction of the octagonal working pit supporting member, so that the octagonal working pit supporting member is convenient to mount and dismount, the collision and abrasion between the members can be reduced, and the service life of the members is prolonged.
The utility model discloses when concrete implementation, octagon work hole supporting component and installation and construction technology thereof adopts casting or steel or combined material, and the reverse construction method is under construction, include:
vertically excavating from the ground along the position of a pipe jacking or directional drilling working pit, excavating a layer of working pit with the same height and area as the protecting wall of the working pit, splicing the four protecting walls of the working pit, and buckling H-shaped steel cross braces to form a layer of octagonal working pit supporting member; rubber water stops (or rubber abrasion pads) are additionally arranged between the component blocks (or joints) and between layers;
vertically excavating downwards, excavating a layer of working pit, and splicing and assembling a layer of working pit supporting member through a hoop, a fastener or a bolt; the maximum height of each layer is not more than 2 m;
sequentially supporting from top to bottom until a preset design elevation is reached, and sealing the bottom by using reinforced concrete;
after the excavation and the supporting assembly of the whole working pit are finished, the laying direction of two layers of pipelines at the bottommost part is replaced with the specially-made section of the opening, and the pipelines are sequentially replaced on one side;
after the pipeline and the accessory facilities are installed and constructed, the supporting member of the working pit is sequentially backfilled and disassembled from the bottom layer by layer until reaching the ground; and (4) completely dismantling the supporting members of the working pit, and transporting the dismantled prefabricated members of the supporting structure of the working well back to inspection and maintenance to ensure safety and reliability in next assembling.
The utility model discloses an octagonal working pit supporting member is layered and partitioned, and is suitable for working pits with the width of 4 m-8 m and the length of 4 m-9.5 m; the height of each layer is 1.5m and 2m (the opening section is specially made, the height is 3m and 4m), and the minimum height is more than 4 layers (the total assembly depth is not less than 6 m); each layer is divided into at least 4 blocks (or 4 sections), and the maximum length of each component is about 4.5 m.
During on-site construction, finished components (cast, steel or composite materials) can be adopted, and the steel plate is manufactured in a layered and partitioned mode, assembled on site, constructed and disassembled after construction, is convenient to transport and hoist, is inspected and maintained off site, is not easy to deform, and is safe and reliable in structure and reusable. Each member includes a body structure, connectors (clips, latches, fasteners, etc.), supports, etc.
The size of the working pit is divided according to the pipe diameter of a drainage (rainwater and sewage) pipeline, and the working pit is also suitable for professional pipelines such as water supply, heating power and gas, and power and communication pipe culverts, and the like, and the working pit is detailed in the following table 1:
TABLE 1 Table of dimensions of work pit for pipe jacking construction
The data in the table are only the size of a common working pit and the range of applicable pipe diameter; according to the size of prefabricated components of the working pit, the net size of the plane of the working pit which can be assembled comprises various specifications such as 6m multiplied by 5m, 6m multiplied by 6m, 7.5m multiplied by 4m, 7.5m multiplied by 5m, 8m multiplied by 8m, 9.5m multiplied by 5m, 9.5m multiplied by 6m and the like, and the net size can be adjusted according to the actual situation of the site and the adopted equipment situation during construction.
TABLE 2 working pit size List for Directional drilling construction
The present invention is not limited to the above embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some replacements and transformations for some technical features without creative labor according to the disclosed technical contents, and these replacements and transformations are all within the protection scope of the present invention.
Claims (9)
1. An octagonal working pit supporting member is characterized by comprising a surrounding frame-shaped working pit retaining wall, wherein the surrounding frame-shaped working pit retaining wall is formed by butting a frame-shaped plate and a straight plate, and the frame-shaped plate and the straight plate are connected through symmetrically distributed H-shaped steel cross braces; the working pit retaining wall comprises an inner layer steel plate and an outer layer steel plate, a steel plate stiffening rib is arranged between the inner layer steel plate and the outer layer steel plate, and an interlayer connecting piece connected with the adjacent interlayer working pit retaining wall is arranged at the bottom of the working pit retaining wall;
the H-shaped steel cross braces are connected with the retaining walls of the working pits, the adjacent octagonal supporting members are connected through the interlayer connecting pieces, the layer-by-layer excavation of the working pits of the pipe jacking or directional drilling is implemented, and the octagonal supporting members after excavation are reversely disassembled and recovered.
2. An octagonal working pit supporting construction as claimed in claim 1, wherein the steel plate stiffeners are equally spaced along the inner and outer steel plates of the working pit retaining wall.
3. The octagonal work pit supporting structure of claim 1, wherein the steel plate stiffeners comprise vertical plates and two horizontal reinforcing bars connected therebetween, the vertical plates are welded 90 ° along the inner and outer steel plate walls of the work pit retaining wall; two horizontal reinforcing bars are welded along the inner and outer steel plate walls of the protecting wall of the working pit respectively.
4. An octagonal working pit supporting structure as claimed in claim 1, wherein the steel plate stiffeners are vertical frame-shaped plates, and flanges at both ends of the frame-shaped plates are welded to the inner and outer steel plate walls of the working pit retaining wall, respectively.
5. An octagonal work pit supporting member as claimed in claim 4, wherein the frame-shaped plates and the straight plates are butted to form an octagonal supporting member, the butting planes have an inclination angle of 45 ° and the inclination directions of the contact planes are the same; a rubber water stop belt or a rubber abrasion pad is padded between the butt joint surfaces.
6. An octagonal working pit supporting structure as claimed in claim 1, wherein the outer surfaces of the inner and outer layers of steel plates of the working pit retaining wall are corrugated.
7. The octagonal work pit supporting member according to claim 1, wherein the H-shaped steel wales are tied between the four sides of the octagonal supporting member and the corner cutting member, at least four pairs of the H-shaped steel wales are symmetrically distributed along the octagonal work pit retaining wall, and the H-shaped steel wales are hung or connected by screw threads.
8. The octagonal work pit supporting member according to claim 1, wherein at least one pair of H-section steel wales are tied between the long sides and the corner cutting members of the octagonal supporting member, and at least another pair of H-section steel wales are tied between the long sides and the short sides of the octagonal supporting member.
9. The octagonal working pit supporting member according to claim 8, wherein a stiffening brace is further connected to the H-shaped steel cross brace connected between the long side and the short side, the stiffening brace is formed by welding a connecting ring along the middle of the H-shaped steel cross brace, a pair of stiffening braces are horizontally fastened to the connecting ring, and the other ends of the pair of stiffening braces are respectively connected between the long side and the short side of the inner wall of the working pit retaining wall to form a cross structure with the H-shaped steel cross brace.
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| CN202121430323.6U CN217150257U (en) | 2021-06-25 | 2021-06-25 | Octagonal working pit supporting member |
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| CN202121430323.6U CN217150257U (en) | 2021-06-25 | 2021-06-25 | Octagonal working pit supporting member |
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| CN217150257U true CN217150257U (en) | 2022-08-09 |
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Effective date of registration: 20221017 Address after: 710001 Zhongcai Financial Building, No. 22, Heping Road, Beilin District, Xi'an, Shaanxi 1002A-B020 Patentee after: Xi'an Haojiheng Municipal Engineering Co.,Ltd. Address before: 710055 Yanta Road 13, Xi'an City, Shaanxi Province Patentee before: XIAN University OF ARCHITECTURE AND TECHNOLOG |
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