WO2020244268A1

WO2020244268A1 - Variable cross-section pipe gallery structure suitable for rapid construction and construction method therefor

Info

Publication number: WO2020244268A1
Application number: PCT/CN2020/078534
Authority: WO
Inventors: 吴庆雄; 陈荣刚; 胡善华; 杨益伦; 陈洪毅
Original assignee: 福州大学; 福建高速至信建设管理有限公司
Priority date: 2019-06-06
Filing date: 2020-03-10
Publication date: 2020-12-10
Also published as: CN110093948B; CN110093948A

Abstract

The present invention relates to a pipe gallery cross-section structure suitable for rapid construction, comprising a top plate, side walls, and a bottom plate. A variable cross-section structure is used for the top plate of which the cross-section height changes gradually. The side walls are provided on two sides of the top plate. A chamfered portion is provided between the side wall and the flat bottom plate. A top mold attached to the top plate is provided below the top plate in the pipe gallery construction. A side mold attached to the side wall is provided below the top mold. A hinge structure is provided between the top mold and the side mold. The present invention also relates to a construction method for the pipe gallery cross-section structure suitable for rapid construction. According to the present invention, the structure of the variable cross-section top plate of which the cross-section height changes gradually can effectively eliminate the stress concentration phenomenon of the pipe gallery under the action of the top and lateral earth pressure and other external loads, and can also fully reduce the weight thereof, save materials, and exert the characteristics of structural force. Accordingly, a curved top mold matching the structure of the variable cross-section top plate is connected to the side mold by means of the hinge structure to form an integral steel inner membrane without bending angles, which is fully suitable for rapid construction of the pipe gallery.

Description

Variable section pipe gallery structure suitable for rapid construction and its construction method

Technical field

The invention relates to a pipe gallery section structure suitable for rapid construction and a construction method thereof.

Background technique

The development and progress of modern society is faster and faster, the construction of urban municipal infrastructure is more and more complete, the urban underground space resources are getting narrower and smaller, and the space resources are becoming more and more precious. In most cities in my country, all kinds of pipelines are basically laid by traditional direct buried methods. Directly buried pipelines are convenient for construction, but their service life is short, and the laying of various types of pipelines is disorderly, occupying a lot of underground space. The city’s capital construction projects crossed, and the laying of pipelines was damaged. Once directly buried pipelines are damaged, they need to be grooved and broken for inspection and repair. This will not only cause traffic jams, bring inconvenience to citizens' normal travel, but also pollute the surrounding environment and affect the city's appearance. In order to solve the shortcomings of traditional directly buried pipelines and make full and reasonable use of underground space resources, in recent years, the construction of underground pipe corridors has been vigorously developed in China.

At present, underground concrete pipe gallery structures such as municipal pipe gallery and underground passage generally adopt the form of integral cast-in-place or segmental prefabrication and on-site splicing. Although the prefabricated pipe gallery can be quickly prefabricated and shortened the construction period, the length of the section limited by the lifting weight is shorter, resulting in more joints and poor waterproof performance. It is not applicable if the buried line has a height difference and a large corner change. The design concepts and specifications of the relevant prefabricated pipe gallery are not yet fully mature; the pipe gallery is cast as a whole on site, because the structure has good waterproof and seismic performance, can adapt to complex structural cross-sections, and the relevant design specifications, construction techniques and processes are relatively mature and widely used application.

technical problem

However, the traditional pipe gallery structure makes the cast-in-place formwork support system more complicated, and the installation and removal efficiency of the formwork is low. In addition, the traditional cast-in-place construction technology uses manual labor to independently complete the various procedures of the cast-in-place in a small cabin, which seriously reduces the cast-in-place The construction efficiency of the pipe gallery makes the construction process of the pipe gallery slow. Therefore, the relevant research and development of the structure of the pipe gallery and the rapid construction technology are becoming more and more important.

Technical solutions

In view of this, the purpose of the present invention is to provide a pipe gallery section structure suitable for rapid construction and its construction method, which can effectively eliminate the stress concentration phenomenon of the pipe gallery under the action of the top, lateral earth pressure and other external loads. It can also fully reduce its own weight, save materials and give full play to the characteristics of structural forces.

The technical scheme of the present invention is: a pipe gallery section structure suitable for rapid construction, including a top plate, a side wall and a bottom plate. The top plate adopts a variable cross-section structure with a gradually changing section height. The side walls are arranged on both sides of the top plate. A chamfer is set between the wall and the flat bottom plate, a top mold is set below the top plate to fit the top plate, and a side mold that fits the side wall is set below the top mold, and set between the top mold and the side mold There is a hinged structure.

Further, a variable-section roof with a gradually changing section height is formed by a circular curve transition at the junction of the side wall and the roof, and then a gradual curve transition to the middle span of the roof.

Further, the side mold and the top mold are connected by a hinged structure to form an integral steel inner membrane with no corners, which is fully suitable for rapid construction of the pipe gallery.

Further, the bottom plate and the side wall are in rectangular cross-sectional form, and the transition between the side wall and the bottom plate is a straight chamfered part.

Another technical solution provided by the present invention is a construction method of a variable cross-section pipe gallery structure suitable for rapid construction, including the pipe gallery cross-sectional structure suitable for rapid construction: (1) Carrying out the pipe gallery floor structure Construction: During the construction process, follow the traditional cast-in-situ pipe gallery construction method to complete site leveling, supporting pile construction, earth excavation and setting of horizontal bracing, pile foundation inspection, foundation pit acceptance, cushion laying, waterproof treatment, pipe gallery floor Structural pouring and maintenance; (2) Side wall steel reinforcement installation: Before installation, during the installation of the side wall steel reinforcement, the steel reinforcement is completed on the side wall reinforcement membrane frame in the steel processing shed and transported to the construction site. Use a crane to install and position the side wall reinforcement frame; (3) formwork installation: in the formwork installation process, first lay a self-propelled track on the bottom plate, and then the trolley moves into position and locks by itself, because the side wall and the top plate are smooth Curve transition, so the side mold and the top mold can be connected by a hinge structure to form an integral steel inner film without bends. During the mold erection process, the top mold is raised to the control elevation by the trolley column jack and fine-tuned to the inner side of the side wall. Add adjustment joints to lock. Secondly, the side wall formwork uses a lateral jack to push it to the vertical position of the side wall around the top hinge point and lock it by the bottom brace. Once again, install the top plate steel bar and the outer formwork and connect with the top of the inner formwork. Bottom locking; (4) Concrete pouring and curing: After the steel frame and formwork support are qualified, the concrete is poured and vibrated to compact it. After the initial setting of the concrete, the overall cover is completed and steam or hot water of suitable temperature is delivered for curing; (5) Removal of the internal and external formwork: When the concrete reaches the design or relevant specifications, the formwork will be demolished. First, release the top of the outer formwork of the pipe gallery, and release the locking bolts of the inner and outer formwork at the bottom of the side wall, and remove the outer formwork. Then the vertical support bar at the bottom of the inner formwork is lifted, and the lateral jacks retract synchronously to make the side formwork rotate around the top hinge point in the cabin to demold. Finally, the vertical jack of the trolley column retracts to make the top mold separate from the top plate, and the trolley And the whole inner membrane system moves to the next construction section by itself.

Beneficial effect

Compared with the prior art, the present invention has the beneficial effects: it can effectively eliminate the stress concentration phenomenon that occurs under the action of the top, lateral earth pressure and other external loads of the pipe gallery, and can also fully reduce its own weight, save materials and exert structural stress. Power characteristics.

Description of the drawings

Figure 1 is a schematic structural diagram of an embodiment of the present invention;

Figure 2 is a schematic diagram of a template support according to an embodiment of the present invention;

In the picture: 100-bottom plate; 200-side wall; 300-top plate; 400-chamfer; 500-form plate; 600-side mold; 700-hinge structure; 800-top mold.

The best mode of the invention

As shown in Figures 1~2, a pipe gallery section structure suitable for rapid construction includes a top plate 300, a side wall 200 and a bottom plate 100. The top plate 300 adopts a variable cross-section structure with a gradually changing section height, and the side wall 200 is provided On both sides of the top plate 300, a chamfered portion 400 is provided between the side wall 200 and the flat bottom plate 100. A top mold 800 is provided below the top plate 300 to fit the top plate 300, and below the top mold 800 is provided a side wall 200 The laminated side mold 600 has a hinge structure 700 between the top mold 800 and the side mold 600. The junction of the inner edge of the side wall 200 and the top plate 300 adopts a circular curve transition structure, which changes the traditional straight line chamfer transition form, which can effectively eliminate the pipe gallery from the top, lateral earth pressure and other external loads. In the variable section structure, the end section height of the roof 300 structure is relatively large, and the mid-span section height is relatively small. Compared with the pipe gallery structure, the negative bending moment at both ends is relatively large, and the positive bending moment in the middle is relatively large. The matching of the small" force form can fully reduce its own weight, save materials and give full play to the structural force characteristics. The side mold 600 and the top mold 800 are hingedly connected by the hinged structure 700 to form an integral steel inner film without bends, which is fully suitable for the rapid construction of the pipe gallery.

In this embodiment, the variable cross-section top plate 300 with a gradually changing section height is formed by a circular curve transition at the junction of the side wall 200 and the top plate 300, and then a gradual curve transition to the mid-span of the top plate 300.

In this embodiment, the side mold and the top mold corresponding to the cast-in-place construction of the variable cross-section top plate 300 are hingedly connected by a round curve corner mold to form an integral steel inner membrane without bends, which is fully suitable for rapid construction of the pipe gallery.

In this embodiment, the bottom plate 100 and the side wall 200 are both rectangular in cross-section, and the side wall 200 and the bottom plate 100 are transitioned by a straight chamfer 400. The gradual curve segment can be smoothly connected with the circular curve segment, and meets the force requirements of the top plate 300 structure. The gradual curve can be a circular curve or a quadratic parabola.

A construction method of variable cross-section pipe gallery structure suitable for rapid construction, including the described pipe gallery section structure suitable for rapid construction: (1) Construction of the pipe gallery bottom plate 100 structure: in the construction process, follow the traditional current Construction method of pouring pipe gallery: complete site leveling, supporting pile construction, earth excavation and setting of cross bracing, pile foundation inspection, foundation pit acceptance, cushion laying, waterproof treatment, pouring and maintenance of pipe gallery bottom 100 structure; (2) side Wall 200 steel reinforcement installation: Before installation, during the installation process of the side wall 200 steel reinforcement, the steel reinforcement is completed on the side wall 200 reinforcement membrane frame in the steel processing shed and transported to the construction site. The steel frame is installed and positioned; (3) The template 500 is installed: In the process of installing the template 500, first lay a self-propelled track on the bottom plate 100, and then the trolley moves into position and locks by itself, because the side wall 200 and the top plate 300 are smooth Curve transition, so the side mold and the top mold can be connected by the hinge structure 700 to form an integral steel inner film without bends. During the mold erection process, the top mold is raised to the control elevation by the trolley column jack and fine-tuned to the side wall 200. The inner position is locked by adjusting joints. Secondly, the side wall 200 formwork 500 is pushed by a lateral jack to rotate around the top hinge point to the vertical position of the side wall 200 and locked by the bottom brace. Once again, install the top plate 300 steel bars and the outer formwork 500 and locked with the top and bottom of the inner mold; (4) Concrete pouring and maintenance: After the steel frame and template 500 support inspection is passed, the concrete is poured and vibrated to compact it. After the pouring is completed, the concrete will be covered and the appropriate temperature will be delivered after the initial setting. (5) Demolition of the internal and external formwork 500: When the concrete reaches the design or relevant specifications, the demoulding strength is to be started. First, remove the top of the outer formwork 500 of the pipe gallery and pull the screw at the bottom of the side wall 200. The lock bolts of the inner and outer formwork 500 are released, the outer formwork 500 is removed, and then the vertical brace at the bottom of the inner formwork 500 is released, and the side jacks retract synchronously so that the side formwork 500 rotates around the top hinge point in the cabin to demold, and finally the trolley column The vertical jack retracts so that the top mold is separated from the top plate 300, and the trolley and the overall inner membrane system move to the next construction section by themselves.

The above-mentioned operation flow and hardware and software configuration are only preferred embodiments of the present invention, and do not therefore limit the scope of the present invention. Any equivalent transformation made by using the content of the description and drawings of the present invention, or directly or indirectly applied in related technical fields , The same reason is included in the scope of patent protection of the present invention.

Claims

A variable cross-section pipe gallery structure suitable for rapid construction, comprising a top plate, a side wall and a bottom plate, and is characterized in that: the top plate adopts a variable cross-section structure with a gradually changing section height, and the side walls are arranged on both sides of the top plate. There is a chamfered portion between the flat bottom plates. In the construction of the pipe gallery, there is a top mold that is attached to the top board, and a side mold that is attached to the side wall is set below the top mold. Between the top mold and the side mold A hinge structure is provided between.
The variable cross-section pipe gallery structure suitable for rapid construction according to claim 1, characterized in that: the variable cross-section top slab with a gradually changing cross-section height first transitions from the side wall and the top slab through a circular curve, and then transitions to a gradual curve. The roof is formed at the mid-span.
The variable cross-section pipe gallery structure suitable for rapid construction according to claim 2, characterized in that: the side mold and the top mold are connected by a hinged structure to form an integral steel inner membrane with no corners, which is fully suitable for the pipe gallery Fast construction.
The variable cross-section pipe gallery structure suitable for rapid construction according to claim 3, characterized in that: the bottom plate and the side walls are in rectangular cross-sectional forms, and the transition between the side walls and the bottom plate is a straight chamfered part.
A construction method for a variable section pipe gallery structure suitable for rapid construction, comprising the pipe gallery section structure suitable for rapid construction as claimed in claim 4, characterized in that: (1) construction of the pipe gallery floor structure: During the construction process, according to the traditional cast-in-situ pipe gallery construction method, the site leveling, supporting pile construction, earth excavation and setting of transverse bracing, pile foundation inspection, foundation pit acceptance, cushion laying, waterproof treatment, pipe gallery floor structure pouring and Maintenance; (2) Installation of side wall steel bars: Before installation, during the installation of side wall steel bars, the steel bars are produced on the side wall steel frame in the steel bar processing shed and transported to the construction site. Install and locate the side wall steel frame; (3) Install the formwork: In the process of formwork installation, first lay a self-propelled track on the bottom plate, and then move the trolley into position and lock it, because the side wall and the top plate are smoothly curved. Therefore, the side mold and the top mold can be connected by a hinged structure to form an integral steel inner film without bending angles. During the mold erection process, the top mold is raised to the control elevation by the trolley column jack and fine-tuned to the inner side of the side wall with adjustment joints. Lock, secondly, the side wall formwork is pushed out by the lateral jack to rotate around the top hinge point to the vertical position of the side wall and locked by the bottom brace. Once again, install the top plate reinforcement and the outer formwork and lock with the top and bottom of the inner form; (4) Concrete pouring and curing: After the steel frame and formwork support are qualified, the concrete is poured and vibrated to compact it. After the pouring is completed, the concrete will be covered as a whole and steam or hot water of suitable temperature is delivered for curing; (5) Removal of the inner and outer formwork: When the concrete reaches the design or relevant specifications, the formwork will be demolished. First, release the top of the outer formwork of the pipe gallery, and release the locking bolts of the inner and outer formwork at the bottom of the side wall, remove the outer formwork, and then release the inner formwork. The vertical support bar at the bottom of the formwork and the synchronous retraction of the side jacks make the side formwork rotate around the top hinge point in the cabin to demold. Finally, the vertical jack of the trolley column retracts to make the top die and the top plate separate, and the trolley and the whole The membrane system moves to the next construction section by itself.