阅读说明：本技术 箱涵模板体系施工方法 (Construction method of box culvert template system ) 是由 陈孟 闫相明 何锡银 李敏 张鹏 闫兴旺 于 2019-10-17 设计创作，主要内容包括：本发明公开了一种箱涵模板体系施工方法,涉及公路工程混凝土施工技术领域,其技术方案要点包括以下步骤：施工准备、下部结构模板体系安装、下部结构混凝土浇筑、下部结构内外模脱模、上部结构模板体系安装、上部结构混凝土浇筑、模板整体脱模、竣工验收；具有工作效率高、材料损耗小、成本较低、经济合理、适用便捷的效果。(The invention discloses a box culvert template system construction method, which relates to the technical field of highway engineering concrete construction, and the technical scheme is characterized by comprising the following steps of: construction preparation, installation of a lower structure template system, pouring of lower structure concrete, demoulding of an inner mold and an outer mold of a lower structure, installation of an upper structure template system, pouring of upper structure concrete, demoulding of the whole template and acceptance check; the device has the effects of high working efficiency, small material loss, lower cost, economy, reasonability, applicability and convenience.)

1. The box culvert template system construction method is characterized by comprising the following steps of:

s1, construction preparation: measuring and paying off a lower structure, an upper structure and inner and outer template structures of the box culvert according to a construction contract and a design drawing, and carrying out template structure safety checking calculation according to construction load;

s2, installing a lower structure template system: installing and laying a lower structural area by adopting reinforcing steel bars, then installing a lower inner side wall steel template (21) and a lower outer side wall steel template (22) on the lower structural reinforcing steel bars, supporting the lower inner side wall steel template (21) and the lower outer side wall steel template (22) in a batten (23), detachably arranging a lower water-stop counter-pulling screw (25) between the lower inner side wall steel template (21) and the lower outer side wall steel template (22), and performing quality acceptance after the steel templates and the reinforcing steel bars are installed;

s3, pouring concrete of the lower structure: concrete is poured between the lower inner side wall steel formwork (21) and the lower outer side wall steel formwork (22) to form a lower part structure;

s4, demolding of the inner mold and the outer mold of the lower structure: after the lower-section structure concrete is poured and molded, the lower water-stop counter-pulling screw rod (25) is dismantled, the lower template system sliding device (4) is installed on the lower outer side wall steel template (22), and the lower outer side wall steel template (22) is demoulded from the lower-section structure through the lower template system sliding device (4) and is pushed to the lower-section structure to install the lower-section structure template system;

s5, installing an upper structure template system: laying upper inner side wall steel templates (51), arranging a top formwork wood template (52) between the upper inner side wall steel templates (51) on two sides to form an upper structure top inner formwork structure, supporting the upper structure through a pipe erecting support structure (6) arranged on the upper structure, arranging and laying an upper structure area on a lower structure and the upper structure top inner formwork structure by using steel bars, erecting a formwork support formwork in the upper structure area, arranging upper outer side wall steel templates (53) on the upper structure steel bars, detachably arranging upper water stop counter-pulling screw rods (55) between the upper inner side wall steel templates (51) and the upper outer side wall steel templates (53), and checking and accepting the quality of the steel templates and the steel bars after the installation is finished;

s6, pouring superstructure concrete: concrete is poured between the upper inner side wall steel formwork (51) and the upper outer side wall steel formwork (53) to form an upper structure, and a section of box culvert is formed by the upper structure and the lower structure;

s7, integrally demolding the template: after the upper structure concrete is poured and formed, the upper water stop counter-pulling screw rods (55) are dismantled, an upper template system sliding device (61) is installed on the upper outer side wall steel template (53), and the upper outer side wall steel template (53) is demoulded from the upper structure through the upper template system sliding device (61) and is pushed to the lower section upper structure to install the upper structure template system; a sliding system (7) is installed on the pipe erecting support structure (6), a telescopic top plate structure (8) is arranged between the pipe erecting support structure (6) and the upper inner side wall steel formwork (51) and the top formwork wood formwork (52), the upper inner side wall steel formwork (51) and the top formwork wood formwork (52) are demolded from the upper structure through the telescopic top plate structure (8), and the upper inner side wall steel formwork and the top formwork wood formwork are pushed to the lower upper structure through the sliding system (7) on the lower structure to install the upper structure formwork system;

s8, completion acceptance: and after the multi-section box culvert is continuously constructed, carrying out overall acceptance inspection on the box culvert.

2. The box culvert template system construction method of claim 1, characterized in that: when the lower structure formwork system is installed, a first steel pipe inclined strut (24) is installed on a lower outer side wall steel formwork (22).

3. The box culvert template system construction method of claim 1, characterized in that: in the lower structure concrete pouring step, a water stop steel plate (3) is laid on the top end of the lower structure after the concrete pouring.

4. The box culvert template system construction method of claim 1, characterized in that: and connecting plates (31) are integrally and vertically arranged on two end faces of the water stop steel plate (3), and two ends of each connecting plate (31) are respectively positioned in the upper structure and the lower structure.

5. The box culvert template system construction method of claim 1, characterized in that: the lower template system sliding device (4) comprises a fixed frame (41) fixedly arranged on a lower outer side wall steel template (22), a sliding rod (42) with one end sliding to penetrate through the fixed frame (41), a lower template pulley block (43) arranged on the other end of the sliding rod (42) and an adjusting screw rod (44) with one end rotating and arranged on the lower template pulley block (43), and the other end of the adjusting screw rod (44) is in threaded rotation connection with the fixed frame (41).

6. The box culvert template system construction method of claim 1, characterized in that: when the superstructure formwork system is installed, a second steel pipe diagonal brace (54) is installed on the upper outer side wall steel formwork (53).

7. The box culvert template system construction method of claim 1, characterized in that: the upper template body sliding device (61) comprises an upper template pulley block fixedly arranged on the upper outer side wall steel template (53).

8. The box culvert template system construction method of claim 1, characterized in that: the sliding system (7) comprises a fixed plate (71) fixedly installed on the frame tube supporting structure (6), a guide rod (72) with one end penetrating through the fixed plate (71) in a sliding mode, a guide wheel set (73) installed on the other end of the guide rod (72) and a control screw rod (74) with one end arranged on the guide wheel set (73), and the other end of the control screw rod (74) is connected to the fixed plate (71) in a threaded rotating mode.

9. The box culvert template system construction method of claim 1, characterized in that: the telescopic top plate structure (8) comprises a fixing seat (81) and a rotating screw rod (82), wherein the fixing seat (81) and one end of the fixing seat are fixed on an upper inner side wall steel template (51) and a top formwork wood template (52) respectively, the rotating screw rod (82) is arranged on the fixing seat (81) in a rotating mode, and the other end of the rotating screw rod (82) is connected to the frame pipe supporting structure (6) in a rotating mode through threads.

10. The box culvert template system construction method of claim 1, characterized in that: drainage grooves (1) are dug at two sides of the lower structure constructed along the length direction of the lower structure.

Technical Field

The invention relates to the technical field of highway engineering concrete construction, in particular to a box culvert template system construction method.

Background

The box culvert is widely applied to the engineering fields of traffic, drainage and the like, and according to the using function of the box culvert, the box culvert engineering generally has the characteristics that the line shape is excessively smooth, and the section size is kept relatively fixed within a certain length range. The box culvert usually has a single-hole, double-hole or multi-hole section and belongs to a horizontal hollow structure form.

In the traditional construction process of the box culvert reinforced concrete cast-in-place structure, the conventional construction method of box culvert template engineering is to erect a steel pipe scaffold in a culvert to reinforce a culvert body template, and the template, a screw rod and a full-space bracket are adopted to carry out segmental assembling erection and dismantling, so that the template engineering is long in construction period, large in turnover material loss and high in equipment and labor cost.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the box culvert template system construction method which has the effects of high working efficiency, small material loss, lower cost, economy, reasonability, applicability and convenience.

In order to achieve the purpose, the invention provides the following technical scheme:

a box culvert template system construction method comprises the following steps of S1: measuring and paying off a box culvert lower structure, an upper structure and inner and outer template structures according to a construction contract and a design drawing, and carrying out template structure safety checking calculation according to construction load; s2, installing a lower structure template system: installing and laying a lower structural area by using reinforcing steel bars, installing a lower inner side wall steel template and a lower outer side wall steel template on the lower structural reinforcing steel bars, supporting the lower inner side wall steel template and the lower outer side wall steel template through a batten inner support, detachably arranging a lower water-stopping counter-pull screw rod between the lower inner side wall steel template and the lower outer side wall steel template, and performing quality acceptance after the steel templates and the reinforcing steel bars are installed; s3, pouring concrete of the lower structure: pouring concrete between the lower inner side wall steel formwork and the lower outer side wall steel formwork to form a lower part structure; s4, demolding of the inner mold and the outer mold of the lower structure: after the lower-section structure concrete is poured and formed, the lower water stop counter-pulling screw is dismantled, a lower template system sliding device is installed on the lower outer side wall steel template, and the lower outer side wall steel template is demoulded from the lower-section structure through the lower template system sliding device and is pushed to the lower-section structure to install the lower-section structure template system; s5, installing an upper structure template system: laying an upper inner side wall steel template, arranging a top template wood template between the upper inner side wall steel templates on two sides to form an upper structure top inner template structure, supporting the upper structure through a pipe erecting support structure arranged on the upper structure, arranging and laying an upper structure area on a lower structure and the upper structure top inner template structure by adopting reinforcing steel bars, erecting a template of a template support in the upper structure area, arranging the upper outer side wall steel template on the upper structure reinforcing steel bars, detachably arranging an upper water stop counter-pulling screw rod between the upper inner side wall steel template and the upper outer side wall steel template, and performing quality acceptance on the steel templates and the reinforcing steel bars after the installation is finished; s6, pouring superstructure concrete: pouring concrete between the upper inner side wall steel formwork and the upper outer side wall steel formwork to form an upper structure, and forming a section of box culvert with the lower structure; s7, integrally demolding the template: after the upper structure concrete is poured and formed, the upper water stop counter-pulling screw rods are dismantled, the upper side wall steel formwork is provided with an upper formwork system sliding device, and the upper side wall steel formwork is demoulded from the upper structure through the upper formwork system sliding device and is pushed to the upper structure of the lower section to be installed with the upper structure formwork system; a sliding system is arranged on the pipe erecting support structure, a telescopic top plate structure is arranged between the pipe erecting support structure and the upper inner side wall steel formwork and the top formwork wood formwork respectively, and after the upper inner side wall steel formwork and the top formwork wood formwork are demolded from the upper structure through the telescopic top plate structure, the upper inner side wall steel formwork and the top formwork wood formwork are pushed to the lower section upper structure through the sliding system to be arranged on the lower section upper structure; s8, completion acceptance: and after the multi-section box culvert is continuously constructed, carrying out overall acceptance inspection on the box culvert.

According to the arrangement, the box culvert template system integrally adopts template and formwork support to adopt integrated construction through the lower inner side wall steel template, the lower outer side wall steel template, the upper inner side wall steel template, the top formwork wood template and the upper outer side wall steel template, so that repeated dismantling and erecting processes of the template and the formwork support are avoided, the construction process is simplified, the engineering period is shortened, and the construction efficiency is improved; after the template system is built, the sliding device for adjusting the lower template system and the support of the sliding system are adopted to fall to the ground, the template system is pushed manually to integrally slide to the next section for circular construction, and the operation is simple, suitable and convenient; the template and the formwork support frame in the box culvert template system are erected at one time, the installation and demoulding of the upper inner side wall steel template and the top template wood template are adjusted through the telescopic top plate structure, and the turnover material loss is basically avoided in the construction process; the construction of the template system is built at one time, so that repeated building and dismantling of the template system in the traditional construction are reduced, the construction speed is accelerated, the turnover period of materials is shortened, the labor intensity is reduced due to the slippage of the box culvert template system, and the labor cost is reduced; the template system is set up and safely checked and accepted at one time according to the construction scheme, safety deviation factors existing in the repeated setting process of the frame body are eliminated, the template system can be repeatedly utilized, the consumption of turnover materials and resources is reduced in the construction process, no waste is generated, and the template system is green and environment-friendly; through carrying out construction preparation, substructure formwork system installation, substructure concrete placement, substructure inside and outside mould drawing of patterns, superstructure formwork system installation, superstructure concrete placement, the whole drawing of patterns of template, completion acceptance construction step in proper order, have that work efficiency is high, the material loss is little, the cost is lower, economical and reasonable, be suitable for convenient effect.

Further setting: when the lower structure template system is installed, a first steel pipe inclined strut is installed on the lower outer side wall steel template.

So set up, support outer side wall steel form down through first steel pipe bracing, improve outer side wall steel form down in substructure concrete placement's construction stability.

Further setting: in the lower structure concrete pouring step, a water stop steel plate is laid on the top end of the lower structure after the concrete pouring.

So set up, improve the waterproof performance of substructure on the one hand, improve the stability of being connected between substructure and the superstructure simultaneously.

Further setting: and connecting plates are integrally and vertically arranged on two end faces of the water stop steel plate, and two ends of each connecting plate are respectively positioned in the upper structure and the lower structure.

So set up, through the connecting plate of perpendicular to stagnant water steel sheet, improve the stability of being connected between substructure and the superstructure.

Further setting: lower bolster system displacement device includes that mount, one end of fixed mounting on outer side wall steel form down all slide and wear to locate the slide bar on the mount, install lower bolster assembly pulley and one end on the slide bar other end and rotate the adjusting screw who sets up on the lower bolster assembly pulley, just adjusting screw's other end screw thread rotate connect in on the mount.

By means of the arrangement, the adjusting screw rod is rotated, and the pulley block in the lower template system sliding device is controlled to be used for supporting the ground or separating from the ground, so that the lower outer side wall steel template can be demoulded from the lower structure and pushed to the lower section lower structure to be installed on the lower structure template system; when the substructure is constructed, the pulley block is separated from the ground through the adjusting screw rod, so that the lower outer side wall steel template is supported on the ground, and the stability of the lower construction is improved.

Further setting: when the superstructure template system is installed, install the second steel pipe bracing on last outside wall steel form.

So set up, support last outer side wall steel form through second steel pipe bracing, improve the construction stability of last outer side wall steel form at superstructure concrete placement.

Further setting: : the upper template body system sliding device comprises an upper template pulley block fixedly arranged on the upper outer side wall steel template.

So set up, be convenient for pass last outer side wall steel form through the cope match-plate pattern assembly pulley, will be outer side wall steel form down from the substructure on the drawing of patterns and pass to the effect that lower section substructure department carries out substructure template system installation.

Further setting: the system that slides includes fixed plate, the equal guide bar that wears to locate the fixed plate of sliding of one end on frame pipe bearing structure, installs the direction wheelset on the guide bar other end and one end sets up the control screw on the direction wheelset, just the other end screw thread of control screw rotate connect in on the fixed plate.

By means of the arrangement, the control screw is rotated to further control the guide wheel set in the sliding system to be used for supporting the ground or separating from the ground, so that the effect of pushing the upper outer side wall steel template to the upper structure of the lower section to install the upper structure template system can be achieved; when superstructure construction, break away from ground with the assembly pulley through adjusting screw, make and go up outer side wall steel form and support on subaerial, improve the stability of superstructure construction.

Further setting: the telescopic top plate structure comprises a fixed seat and a rotating screw rod, wherein the fixed seat and one end of the fixed seat are respectively fixed on the upper inner side wall steel formwork and the top formwork wood formwork, the rotating screw rod is respectively arranged on the fixed seat in a rotating mode, and the other end of the rotating screw rod is connected to the frame pipe supporting structure in a rotating mode through threads.

So set up, through operating the turnscrew, the purpose of interval modulation between inboard side wall steel form, top mould plank sheathing and the frame pipe bearing structure is gone up in the realization, can realize the drawing of patterns or form the purpose of superstructure top inner formwork structure.

Further setting: drainage channels are dug at two sides of the lower structure constructed along the length direction of the lower structure.

So set up, the drainage performance of being convenient for when the construction improves the effect of box culvert template system construction quality.

Compared with the prior art, the invention has the following advantages by adopting the technical scheme:

1. the integral sliding of the box culvert template system is realized by adopting the integrated construction of the template and the formwork support, so that the repeated dismantling and erecting processes of the template and the formwork support are avoided, the construction process is simplified, the engineering period is shortened, and the construction efficiency is improved;

2. the template and the formwork support frame in the box culvert template system are erected at one time, the installation and the removal of the upper inner side wall steel template and the top template wood template are adjusted through the telescopic top plate structure, and the turnover material loss is basically avoided in the construction process;

3. after the template system is built, the sliding device for adjusting the lower template system and the support of the sliding system are adopted to fall to the ground, the template system is pushed manually to integrally slide to the next section for circular construction, and the operation is simple, suitable and convenient;

4. the construction of the template system is built at one time, so that repeated building and dismantling of the template system in the traditional construction are reduced, the construction speed is accelerated, the turnover period of materials is shortened, the labor intensity is reduced due to the slippage of the box culvert template system, and the labor cost is reduced;

5. the template system is set up and safely checked and accepted at one time according to the construction scheme, safety deviation factors existing in the repeated setting process of the frame body are eliminated, the template system can be repeatedly utilized, the consumption of turnover materials and resources in the construction process is reduced, no waste is generated, and the method is green and environment-friendly.

Drawings

FIG. 1 is a sectional view showing the installation of steel forms of lower inner and outer side walls in a lower structure;

FIG. 2 is a sectional view of a lower inner and outer side wall steel form in the substructure after removal of the form;

FIG. 3 is a schematic structural view of a lower template system sliding device;

FIG. 4 is a schematic diagram of the slippage of the steel formwork of the lower outer side wall of the box culvert substructure;

FIG. 5 is a sectional view of the steel forms of the upper inner and outer side walls installed in the superstructure;

FIG. 6 is a partial enlarged view of the telescopic top plate structure during installation of the steel forms of the upper inner and outer sidewalls;

FIG. 7 is a partial enlarged view of the place where the sliding system is installed in the steel form of the upper inner and outer sidewalls;

FIG. 8 is a sectional view of the upper inner and outer side walls in the superstructure after removal of the steel form;

FIG. 9 is a partial enlarged view of the upper inner and outer side walls during form removal;

figure 10 is a schematic diagram of the slippage of the steel formwork of the outer side wall on the upper structure of the box culvert.

In the figure: 1. a drainage gutter; 21. a lower inside wall steel form; 22. a lower outer side wall steel form; 23. wood block; 24. a first steel pipe diagonal bracing; 25. the lower water stop oppositely pulls the screw rod; 3. a water stop steel plate; 31. a connecting plate; 4. a lower template system sliding device; 41. a fixed mount; 42. a slide bar; 43. a lower template pulley block; 44. adjusting the screw rod; 51. an upper inner side wall steel formwork; 52. a top-form wooden template; 53. mounting an outer side wall steel formwork; 54. a second steel pipe diagonal bracing; 55. the upper water stop oppositely pulls the screw rod; 6. a rack pipe support structure; 61. the upper template body is a sliding device; 7. a slipping system; 71. a fixing plate; 72. a guide bar; 73. a guide wheel set; 74. controlling the screw; 8. a telescopic top plate structure; 81. a fixed seat; 82. the screw is turned.

Detailed Description

The construction method of the box culvert template system is further explained with reference to the attached drawings.

A box culvert template system construction method comprises the following steps:

s1, construction preparation: compiling a special construction technical scheme according to a construction contract, a drawing and a related design file; measuring and paying off a lower structure, an upper structure and inner and outer template structures of the box culvert according to a construction contract and a design drawing; as shown in fig. 1, drainage channels 1 are dug in both sides of the lower structure constructed in the length direction thereof, and the safety of the formwork structure is checked according to the construction load.

S2, installing a lower structure template system: as shown in fig. 1, a lower structural area is installed and paved by using steel bars, then a lower inner side wall steel formwork 21 and a lower outer side wall steel formwork 22 are installed at the lower structural steel bars, and the lower inner side wall steel formwork 21 and the lower outer side wall steel formwork 22 are supported in a batten 23; the lower inner side wall steel formwork 21 and the lower outer side wall steel formwork 22 are assembled by steel formworks, the steel formworks are connected by bolts, the assembled large formwork is reinforced by steel pipes, fasteners and iron wires to form a large integral formwork, and a first steel pipe inclined strut 24 is arranged on the lower outer side wall steel formwork 22 and used for supporting the integral formwork; can dismantle between lower inside wall steel form 21 and lower outside wall steel form 22 and be provided with down stagnant water and to drawing screw rod 25, carry out quality inspection and acceptance to it after steel form and reinforcing bar installation finish.

S3, pouring concrete of the lower structure: as shown in fig. 2, concrete is poured between the lower inner side wall steel form 21 and the lower outer side wall steel form 22, and the reinforcing steel bars of the lower structural area are immersed in the poured concrete to form a lower structure; meanwhile, a water stop steel plate 3 is laid at the top end of the lower structure after concrete pouring, the water stop steel plate 3 is arranged in a wave shape, connecting plates 31 are integrally and vertically arranged on two end faces, and the lower ends of the connecting plates 31 are located in the lower structure.

S4, demolding of the inner mold and the outer mold of the lower structure: as shown in fig. 2 and 4, after the lower-section concrete is poured and formed, the lower water stop counter-pulling screw 25 is removed, the lower template system sliding device 4 is installed on the lower outer side wall steel template 22, and the lower outer side wall steel template 22 is demolded from the lower-section structure through the lower template system sliding device 4 and is pushed to the lower-section structure to install the lower-section template system.

As shown in fig. 3, the lower template system sliding device 4 includes a fixed frame 41 fixedly installed on the lower outer side wall steel template 22 at intervals, a sliding rod 42 with one end slidably penetrating the fixed frame 41, a lower template pulley block 43 installed on the other end of the sliding rod 42, and an adjusting screw 44 with one end rotatably installed on the lower template pulley block 43; the other end of the adjusting screw 44 is respectively connected to the fixing frame 41 in a threaded manner, and the pulley block in the lower template system sliding device 4 is controlled to support the ground or separate from the ground by rotating the adjusting screw 44.

S5, installing an upper structure template system: as shown in fig. 5, the upper inside wall steel forms 51 are laid, and a top form wooden form 52 is disposed between the upper inside wall steel forms 51 on both sides, so that it forms a superstructure top inside form structure and is supported by the pipe erection support structure 6 installed on the superstructure; adopt the reinforcing bar to install the superstructure region on substructure and superstructure top inner formwork structure and lay, and carry out mould support template in superstructure region and set up, go up outer side wall steel form 53 installation to superstructure reinforcing bar again, install second steel pipe bracing 54 on last outer side wall steel form 53, and can dismantle between last inner side wall steel form 51 and last outer side wall steel form 53 and be provided with and end the stagnant water and to drawing screw rod 55, carry out the quality acceptance to it after steel form and reinforcing bar installation finish.

S6, pouring superstructure concrete: as shown in fig. 6, concrete is poured among the water stop steel plate 3, the upper inner side wall steel formwork 51 and the upper outer side wall steel formwork 53; the upper ends of the connecting plates 31 are located in the superstructure and allow the steel reinforcement of the superstructure area to be completely immersed in the cast concrete to form the superstructure and form a section of box culvert with the substructure.

S7, integrally demolding the template: as shown in fig. 8 and 9, after the upper structural concrete is poured and formed, the upper water stop counter-pulling screw 55 is removed, and an upper formwork system sliding device 61 is installed on the upper outer side wall steel formwork 53; demoulding the upper outer side wall steel template 53 from the upper structure through the upper template system sliding device 61 and pushing the upper outer side wall steel template to the lower section upper structure for installing the upper structure template system; the upper-section upper structure is characterized in that a sliding system 7 is installed on the pipe erecting support structure 6, telescopic top plate structures 8 are respectively arranged between the pipe erecting support structure 6 and the upper inner side wall steel formwork 51 and the top formwork wood formwork 52, the upper inner side wall steel formwork 51 and the top formwork wood formwork 52 are demolded from the upper structure through the telescopic top plate structures 8, and then the upper structure formwork system is installed by pushing the upper inner side wall steel formwork 51 and the top formwork wood formwork 52 on the lower structure through the sliding system 7 as shown in the figure 10.

As shown in fig. 6, the upper template system sliding device 61 is a plurality of sets of upper template pulley blocks fixedly arranged on the upper outer side wall steel template 53 at intervals; the telescopic top plate structure 8 comprises a fixed seat 81 fixed on the upper inner side wall steel formwork 51 and the top formwork wood formwork 52 respectively and a rotating screw 82 with one end rotatably arranged on the fixed seat 81 respectively, and the other end of the rotating screw 82 is in threaded rotation connection with the frame pipe supporting structure 6; the purpose of adjusting the distance between the upper inner side wall steel template 51, the top formwork wood template 52 and the pipe erecting support structure 6 is achieved by operating the rotating screw 82.

As shown in fig. 7, the sliding system 7 includes a fixing plate 71 fixedly installed on the frame tube supporting structure 6 at an interval, a guide rod 72 having one end slidably penetrating the fixing plate 71, a guide wheel set 73 installed on the other end of the guide rod 72, and a control screw 74 having one end rotatably installed on the guide wheel set 73, wherein the other end of the control screw 74 is respectively connected to the fixing plate 71 in a threaded manner, and the control screw 74 is rotated to further control the function of the guide wheel set 73 in the sliding system 7 for supporting the ground or separating from the ground.

S8, completion acceptance: and after the multi-section box culvert is continuously constructed, carrying out overall acceptance inspection on the box culvert.

Before the lower structure template system is installed and the upper structure template system is installed, the steel templates and the top template 52 are coated with the release agent, and after the release is finished, the release agent needs to be coated again to ensure the impression quality of the concrete; the release agent is not polluted in the brushing process.

Through carrying out construction preparation, substructure formwork system installation, substructure concrete placement, substructure inside and outside mould drawing of patterns, superstructure formwork system installation, superstructure concrete placement, the whole drawing of patterns of template, completion acceptance construction step in proper order, have that work efficiency is high, the material loss is little, the cost is lower, economical and reasonable, be suitable for convenient effect.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.