CN114753407B - Combined steel frame structure for pouring full section of underground passage and construction method - Google Patents
Combined steel frame structure for pouring full section of underground passage and construction method Download PDFInfo
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- CN114753407B CN114753407B CN202210348040.XA CN202210348040A CN114753407B CN 114753407 B CN114753407 B CN 114753407B CN 202210348040 A CN202210348040 A CN 202210348040A CN 114753407 B CN114753407 B CN 114753407B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
Abstract
The invention belongs to the technical field of building construction, and relates to a combined steel frame structure for full-section pouring of an underground passage and a construction method, wherein the combined steel frame structure for full-section pouring of the underground passage is adopted for full-section pouring construction, the combined steel frame structure comprises a bracket system arranged in the underground passage, a plurality of embedded upright posts are arranged below the bracket system, and the embedded upright posts are fixedly arranged on a bottom foundation of the underground passage at intervals; the embedded upright posts are fixedly connected through a ground system cross beam; a bottom template is arranged below the ground system beam, and the pressure of concrete pouring is resisted through the ground system beam; the embedded upright post penetrates through the bottom template and is used for supporting the bracket system. According to the invention, the underground passage bottom plate does not need to be finished first, the integral steel frame foundation is arranged at the bottom of the underground passage structure bottom plate, layered pouring is not needed, the full-section one-time pouring of the passage concrete can be finished, the longitudinal construction joint does not exist on the passage side wall, and the risk of later water seepage of the underground passage is reduced.
Description
Technical Field
The invention belongs to the technical field of building construction, and relates to a combined steel frame structure for pouring a full section of an underground passage and a construction method.
Background
The concrete structure of the box-type underground passage is divided into an upper layer and a lower layer or an upper layer, a middle layer and a lower layer in pouring. After the bottom plate or the foundation structure is required to be poured and the strength is reached, the bracket is erected to carry out reinforcement binding, formwork erection and concrete pouring of the side wall and the top plate. This has the following problems:
(1) The longitudinal construction joint exists on the side wall of the channel caused by layered pouring, the side wall becomes a weak point for generating diseases such as water seepage and the like in underground engineering, and the water seepage diseases of the side wall longitudinal construction joint occur in the past engineering;
(2) On the other hand, the construction period is long because the later casting needs to be performed after the former casting concrete reaches the strength requirement.
Disclosure of Invention
In view of the above, the invention aims to solve the problem that a longitudinal construction joint exists on a side wall, and provides a combined steel frame structure for pouring a full section of an underground passage and a construction method.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the combined steel frame structure for pouring the full section of the underground passage comprises a bracket system which is arranged in the underground passage and used for supporting a side template and a top template, wherein a plurality of embedded upright posts are arranged below the bracket system and are fixedly arranged on the bottom foundation of the underground passage at intervals; the embedded upright posts are fixedly connected through a ground system cross beam; a bottom template is arranged below the ground system beam, and the pressure of concrete pouring is resisted through the ground system beam; the embedded upright post penetrates through the bottom template and is used for supporting the bracket system.
Further, the bracket system comprises a side bracket, wherein the side bracket comprises a side upright post and a side cross beam arranged on the side upright post; the side stand column is fixedly arranged on the embedded stand column; the side stand column is provided with a jack, and supports the side template through the jack; the top template is arranged on the side cross beam.
Further, the bracket system also comprises a middle bracket, wherein the middle bracket comprises a middle upright post and a middle cross beam arranged on the middle upright post; the middle vertical column is arranged on the embedded vertical column; the middle cross beam is fixedly connected with the side cross beams through connecting plates.
Further, the side form plate comprises an inclined support for supporting the outer form plate, and the side form plate is fixedly connected with the outer form plate through a pair of pull rods.
Further, the embedded upright post is also provided with a rail, and the bracket system is provided with a roller which is in sliding fit with the rail.
The full-section pouring construction method for the underground passage adopts the combined steel frame structure for full-section pouring of the underground passage, and comprises the following steps:
s1: treating the underground passage foundation, pre-burying foundation bolts, and fixedly mounting pre-burying upright posts;
s2: binding steel bars, erecting a die, placing a concrete cushion block below the bottom template, supporting the bottom template through a bottom plate steel bar framework, and assembling and fixing a bracket system;
s3: pouring the full section, pouring sequentially from bottom to top, and vibrating by adopting an attached vibrator;
s4: after the strength of the concrete of the section meets the requirement, embedding the upright post in the concrete, dismantling or integrally moving the bracket system to the next section for continuous construction.
Further, according to the size of the underground passage of the construction section, the bracket system is prefabricated, and then transported to the site for assembly.
Further, in the process of binding the reinforcing steel bars and setting up the mould, a condensing pipe for reducing hydration heat is arranged in a synchronous pre-buried mode.
The invention has the beneficial effects that:
1. unlike conventional mode, the invention has no need of completing the bottom plate of the underground passage, the integral steel frame foundation is arranged at the bottom of the bottom plate of the underground passage structure, and no need of layered pouring, thus realizing the complete-section one-time pouring of the concrete of the passage, having no longitudinal construction joint on the side wall of the passage and reducing the risk of later water seepage of the underground passage.
2. The components in the steel frame structure for full-section pouring are prefabricated and are synchronously implemented with the channel foundation treatment, so that the workload of site bracket erection is reduced, and the construction progress is accelerated; the size of the steel frame structure is changed according to the section size and the shape of different channels, most of the components except for the components which are embedded into the bottom plate of the channel can be disassembled and reused, and the steel frame structure can be repeatedly used in a plurality of engineering projects.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in the following preferred detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view illustrating an installation of a composite steel frame structure according to the present invention;
FIG. 2 is a schematic view illustrating another installation of the combined steel frame structure according to the present invention;
fig. 3 is an enlarged view of a portion of fig. 1 and 2.
The attached icon is as follows: 1-side uprights; 2-side cross beams; 3-telescoping beams; 4-a steel pipe bracket; 5-middle cross beam; 6-a middle column; 7-connecting plates; 8-top template; 9-side templates; 10-an outer template; 11-inclined support; 12-a pair of pull rods; 13-embedding upright posts; 14-a ground system beam; 15-a bottom template; 16-telescopic beams; 17-track; 18-a roller; 19-diagonal bracing; 20-bedding layers; 21-jack; 22-fixed slot.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present invention by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the invention; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures and descriptions in the drawings may be omitted.
The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present invention, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1 to 3, a combined steel frame structure for pouring a full section of an underground passage is disclosed, which comprises a bracket system arranged in the underground passage and used for supporting a side template 9 and a top template 8, wherein a plurality of embedded upright posts 13 are arranged below the bracket system, and the embedded upright posts 13 are fixedly arranged on the bottom foundation of the underground passage at intervals; the embedded upright posts 13 are fixedly connected through a ground system cross beam 14; a bottom template 15 is arranged below the ground system beam 14, the bottom template 15 is supported on the bottom plate reinforcement cage through a concrete cushion block, the ground system beam 14 resists the pouring pressure of concrete, and the embedded upright posts 13 penetrate through the bottom template 15 to support the support system at the upper part.
The bracket system comprises a side bracket and a middle bracket, wherein the side bracket comprises a side upright post 1 and a side cross beam 2 arranged on the side upright post 1; the side upright posts 1 are fixedly arranged on the embedded upright posts 13; the side upright 1 is provided with a fixed groove 22, a jack 21 is arranged in the fixed groove 22, and the side template 9 is supported by the jack 21; the middle bracket comprises a middle upright post 6 and a middle cross beam 5 arranged on the middle upright post 6; the middle upright post 6 is arranged on the embedded upright post 13; a telescopic beam 3 with adjustable length is arranged between the middle cross beam 5 and the side cross beams 2, and the telescopic beam 3 is fixedly connected with the side cross beams 2 and the middle cross beam 5 respectively through connecting plates 7. The side cross beams 2 and the middle cross beam 5 are provided with steel pipe supports 4, and the top template 8 is arranged on the steel pipe supports 4.
Wherein, the ground system beam 14 is fixedly connected with the side upright posts 1 and the middle upright post 6, the side beam 2 is fixedly connected with the side upright posts 1, and the middle beam 5 is fixedly connected with the middle upright post 6 through the diagonal bracing 19. The ground system cross beam 14 is installed in a multi-section combination mode, and the middle is connected through a telescopic beam 16; the side brackets and the middle bracket are assembled in a bolt connection mode, so that the side brackets and the middle bracket are convenient to detach and recycle.
When the underground passage adopts an open cut construction method, the underground passage further comprises an inclined support 11 for supporting the outer formwork 10, and the side formwork 9 is fixedly connected with the outer formwork 10 through a pair of pull rods 12. When the main channel of the underground passage adopts a cover digging method, the row pile support provides a limiting function for the external template 10, so that the inclined support 11 is not required to be arranged.
As shown in fig. 1 and 2, the bracket system and the embedded upright 13 can be fixedly connected by adopting the connecting plate 7, when the underground passage is longer, the track 17 can be installed on the embedded upright 13, the roller 18 is installed on the bracket system, and the roller 18 is in sliding fit with the track 17, so that the bracket system can translate rapidly.
The full-section pouring construction method for the underground passage adopts the combined steel frame structure for full-section pouring of the underground passage in the embodiment, and comprises the following steps:
s1: the method comprises the steps of processing an underground passage foundation, processing the soil foundation by means of replacement, grouting and the like, arranging a concrete leveling cushion layer 20, embedding bolts, and fixedly installing embedded upright posts 13;
s2: binding steel bars, erecting a die, placing a concrete cushion block below the bottom template 15, supporting the bottom template 15 through a bottom plate steel bar framework, and assembling and fixing a bracket system; and a part of underground channels with larger body weight need to be pre-buried with a condensing pipe for reducing hydration heat in the process of binding steel bars and setting up a mould synchronously in consideration of the influence of hydration heat.
S3: pouring the full section, pouring sequentially from bottom to top, and vibrating by adopting an attached vibrator;
s4: after the strength of the concrete of the section meets the requirement, the embedded upright posts 13 and the ground system cross beams 14 are reserved in the concrete, and the bracket system is removed or integrally moved to the next section for continuous construction.
In the step S2, the bracket system is prefabricated according to the size of the underground passage of the construction section, and then transported to the site for assembly.
The invention realizes the one-time pouring of the full section of the channel concrete, and the channel side wall has no longitudinal construction joint, so that on one hand, the occurrence of water seepage diseases of the construction joint in the channel operation process is avoided, and the structural reliability is further improved; on the other hand, the construction period is greatly shortened by casting the full section at one time, the use of the prefabricated component reduces the workload of on-site bracket erection, and the construction period is further shortened; meanwhile, the application of the detachable and replaceable parts enables the whole steel frame structure to be repeatedly used on a plurality of channel engineering projects with different section sizes and shapes, and has great economic benefits.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.
Claims (7)
1. A full-section pouring construction method for an underground passage is characterized by comprising the following steps of: the combined steel frame structure for pouring the full section of the underground passage comprises a bracket system which is arranged in the underground passage and used for supporting a side template and a top template, wherein a plurality of embedded upright posts are arranged below the bracket system and are fixedly arranged on the bottom foundation of the underground passage at intervals; the embedded upright posts are fixedly connected through a ground system cross beam; a bottom template is arranged below the ground system beam, and the pressure of concrete pouring is resisted through the ground system beam; the embedded upright post penetrates through the bottom template and is used for supporting the bracket system;
the construction method comprises the following steps:
s1: treating the underground passage foundation, pre-burying foundation bolts, and fixedly mounting pre-burying upright posts;
s2: binding steel bars, erecting a die, placing a concrete cushion block below the bottom template, supporting the bottom template through a bottom plate steel bar framework, and assembling and fixing a bracket system;
s3: pouring the full section, pouring sequentially from bottom to top, and vibrating by adopting an attached vibrator;
s4: after the strength of the concrete of the section meets the requirement, embedding the upright post in the concrete, dismantling or integrally moving the bracket system to the next section for continuous construction.
2. The method for pouring the full section of the underground passage according to claim 1, wherein the method comprises the following steps: according to the size of the underground passage of the construction section, the bracket system is prefabricated, and then transported to the site for assembly.
3. The method for pouring the full section of the underground passage according to claim 1, wherein the method comprises the following steps: in the process of binding and setting up the mould, the condensing tube for reducing the hydration heat is pre-buried in step.
4. The method for pouring the full section of the underground passage according to claim 1, wherein the method comprises the following steps: the bracket system comprises a side bracket, wherein the side bracket comprises a side upright post and a side cross beam arranged on the side upright post; the side stand column is fixedly arranged on the embedded stand column; the side stand column is provided with a jack, and supports the side template through the jack; the top template is arranged on the side cross beam.
5. The full-section pouring construction method for the underground passage according to claim 4, wherein the method comprises the following steps: the bracket system also comprises a middle bracket, wherein the middle bracket comprises a middle upright post and a middle cross beam arranged on the middle upright post; the middle vertical column is arranged on the embedded vertical column; the middle cross beam is fixedly connected with the side cross beams through connecting plates.
6. The method for pouring the full section of the underground passage according to claim 1, wherein the method comprises the following steps: the side templates are fixedly connected with the outer templates through the opposite pull rods.
7. The method for pouring the full section of the underground passage according to claim 1, wherein the method comprises the following steps: the embedded upright post is characterized in that a track is further arranged on the embedded upright post, and the support system is provided with rollers and is in sliding fit with the track through the rollers.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210348040.XA CN114753407B (en) | 2022-03-25 | 2022-03-25 | Combined steel frame structure for pouring full section of underground passage and construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210348040.XA CN114753407B (en) | 2022-03-25 | 2022-03-25 | Combined steel frame structure for pouring full section of underground passage and construction method |
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| CN114753407A CN114753407A (en) | 2022-07-15 |
| CN114753407B true CN114753407B (en) | 2023-09-12 |
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