CN112012109A

CN112012109A - Construction process of ultra-small-spacing double-limb pier stud

Info

Publication number: CN112012109A
Application number: CN202010865094.4A
Authority: CN
Inventors: 黄秀飞; 俞建军
Original assignee: Huaheng Construction Group Co ltd
Current assignee: Huaheng Construction Group Co ltd
Priority date: 2020-08-25
Filing date: 2020-08-25
Publication date: 2020-12-01

Abstract

The application relates to a construction process of an ultra-small interval double-limb pier stud, which comprises the following construction steps: s100, digging a positioning hole for pouring the double-limb pier stud, and installing a double-limb pier stud template around the periphery of the positioning hole; s200, preparing quick-setting concrete on site; s300, pouring quick-setting concrete in the positioning hole and the inner cavity of the template, maintaining the solidified double-limb pier stud, and removing the template after the double-limb pier stud reaches a certain strength; and S400, detecting the forming quality of the double-limb pier stud, and checking, accepting and delivering. This application has effectively shortened the effect of the shaping cycle of two limbs pier stud.

Description

Construction process of ultra-small-spacing double-limb pier stud

Technical Field

The application relates to the field of double-limb pier studs, in particular to a construction process of an ultra-small-interval double-limb pier stud.

Background

At present, the double-limb pier stud is a supporting structure widely applied to the construction of viaducts and elevated high-speed railway lines and used for supporting trunk roads. When the distance between two pier studs of the double-limb pier stud is less than 0.2 meter, the double-limb pier stud is defined as an ultra-small distance double-limb pier stud. The occupied area of the ultra-small-space double-limb pier stud is relatively small, valuable land resources can be saved, and meanwhile, the construction difficulty of the ultra-small-space double-limb pier stud is greatly improved.

Chinese patent publication No. CN102817326B discloses a construction method of a bridge construction super-small-spacing double-limb pier stud, which comprises the following construction steps: manufacturing a whole template of the double-limb pier stud and a template of the tower body, and pulling and transporting all the templates to a construction site; drilling all templates through the positioning holes, and carrying out error detection before and after the templates are installed; positioning all the templates by using a conical positioning pin, sealing the gaps at the clamping position by using double faced adhesive tapes, and clamping and fixing by using bolts; the fixing degree of the whole template is further improved by the pull rod with the plastic sleeve sleeved on the outer edge, the spacing is further finely adjusted by the steel wedge, and concrete is poured; after the concrete is fixed and formed, brushing a release agent and removing the mold.

Aiming at the related technologies, the inventor thinks that the defect that the forming period of the double-limb pier stud is greatly delayed because the common concrete is long in consolidation forming time, and further the construction progress of the project is greatly influenced exists.

Disclosure of Invention

In order to shorten the molding cycle of the double-limb pier stud, the application provides a construction process of the super-small-interval double-limb pier stud.

The application provides a super little interval bipedal pier stud construction technology adopts following technical scheme:

the construction process of the ultra-small interval double-limb pier stud is characterized in that: the method comprises the following steps:

s100, surveying and mapping the construction area of the double-limb pier stud, and excavating a positioning hole for pouring the double-limb pier stud; determining and marking the installation positions of all the templates around the periphery of the positioning hole, and then transferring all the templates to a construction site; abutting the convex strips which are matched with each other on the two sides of the template in the width direction against the through grooves to assemble the adjacent templates, simultaneously penetrating the locking bolt through one side wall and the convex strips of the through grooves, and screwing one end of the locking bolt in the length direction into a preset thread groove on the other side wall of the through grooves in a threaded manner so as to fixedly connect the adjacent templates; the assembly of the template in the height direction is carried out in the same way; fixing the bottom plate of the template on the ground through a positioning bolt at the marked position for later use;

s200, preparing the quick-setting concrete on site, wherein the weight ratio of the concrete to the concrete is 18:95:11: 30: respectively pouring 0.5 of water, portland cement, rubber powder, sand and an accelerating agent into a stirring device for stirring to prepare accelerating concrete for later use;

s300, pouring rapid-hardening concrete into cavities of all the templates, and sleeving the rapid-hardening concrete and the outer surfaces of the templates by a curing film; after the rapid hardening concrete reaches a certain strength, the health preserving film and all the templates are removed;

s400, observing whether the outer surface of the double-limb pier stud is damaged or not, detecting the forming thickness and the inner cavity phenomenon of the double-limb pier stud by using an ultrasonic device, and preparing for acceptance and delivery after the double-limb pier stud is detected to be qualified.

By adopting the technical scheme, the raw materials of the quick-setting concrete prepared on site are nearly 62% in the proportion of the raw materials, so that the forming time of the quick-setting concrete slurry is greatly shortened compared with that of the common concrete slurry; meanwhile, the setting time of the quick-setting agent can be shortened by the use amount of the quick-setting agent accounting for 0.5 percent of the total weight ratio, so that the setting time of the quick-setting concrete is greatly shortened compared with that of common concrete, the phenomenon that the forming speed of the quick-setting concrete is too high, and the phenomena that the base of the double-limb pier stud is not tamped enough and cracks are easy to appear are avoided.

Preferably, the following steps are added in step S100: s110, digging depth of the positioning hole needs to exceed 5m, after the positioning hole is dug, a constructor needs to descend into the positioning hole to clean hard stones, then the foundation is compacted, the inner side wall of the positioning hole is adjusted through a scraper, and longitudinal verticality and levelness of the inner side wall of the positioning hole are guaranteed.

By adopting the technical scheme, the positioning holes with the depth of more than 5m account for one fourth of the total height of the double-limb pier stud, so that the double-limb pier stud has a stable and tamped base during solidification, and the position stability of the double-limb pier stud is effectively guaranteed while the double-limb pier stud is quickly cast and molded; the broken stones in the positioning holes are cleaned, the bases of the positioning holes are tamped, the vertical verticality and the levelness of the positioning holes are guaranteed, the position stability of the rapid-hardening concrete in the positioning holes can be further improved, and the stability of the double-limb pier stud after forming is further guaranteed.

Preferably, the following steps are added in step S100: s120, filling gaps between the convex strips and the through grooves with alkali-free glass fiber mesh cloth, and then filling the through grooves with glue; after the glue is solidified, injecting glass cement into the gap between the raised line and the through groove through a glue gun, and compacting the glass cement by using a caulking ball; adjacent forms are treated the same at the right angle transitions.

By adopting the technical scheme, the alkali-free glass fiber mesh cloth fills the cavity in the through groove, and when the glue is condensed in the through groove, the interaction of air at the position is effectively reduced, so that the phenomenon that rapid-setting concrete slurry seeps out at the joint of the templates is reduced, and the forming stability of the double-limb pier stud is effectively guaranteed; after the glass cement is compacted at the through grooves, the infiltration and the permeation of liquid can be effectively reduced, the permeation phenomenon of the rapid hardening concrete at the through grooves is further reduced, and the forming stability of the double-limb pier stud is further ensured.

Preferably, the following steps are added in step S100: s130, after each layer of templates are stacked along the height direction, a side supporting device is required to be arranged on the ground to support the stacked templates; the side supporting device comprises a bottom supporting plate, a connecting column obliquely arranged on the top wall of the bottom supporting plate and a butt plate longitudinally arranged at one end of the connecting column far away from the bottom supporting plate; constructors can push the bottom supporting plate on the ground so that the abutting plate abuts against the outer side wall of the formwork and the formwork is laterally supported; after butt joint board and template lateral wall offset, constructor accessible joint bolt is with bottom fagging and ground fixed connection.

Through adopting above-mentioned technical scheme, the side props the device and can provide effectual supporting effect to the template that piles up from top to bottom, and it has reduced the phenomenon that dislocation separation appears in the template at direction of height both ends, and then has ensured the length and breadth degree when two limbs pier stud shaping, has reduced the unqualified risk of engineering acceptance.

Preferably, in step S200, the water is pure and impurity-free drinking water for human and livestock; the strength of the portland cement is at least 52.5R; the rubber powder is fine sand rubber powder; the sand is engineering fine sand with the particle diameter of 50-70 meshes.

By adopting the technical scheme, the cement with higher strength has a stronger condensation effect after stirring and forming, and the use quality of the double-limb pier stud is effectively guaranteed while the rapid forming of the double-limb pier stud is guaranteed; the human and animal drinking water and the fine sand glue powder have fewer impurities and higher suitability, so that the combination suitability of all raw materials of the quick-setting concrete during stirring and condensation is further improved, and the solidification time of the quick-setting concrete is reduced; the fine sand for engineering of the same specification can stably improve the product quality of the formed double-limb pier stud, and further shorten the condensation time of the double-limb pier stud while ensuring high combination degree with other raw materials.

Preferably, in step S200, the accelerator is prepared on site, and the weight ratio of the accelerator to the accelerator is 1:1: 0.5: 0.2 of alum mud, sodium carbonate blocks, quicklime powder and pure drinking water for people and livestock are poured into a stirring device to be stirred and thickened, so as to prepare the accelerating agent.

By adopting the technical scheme, the setting time of concrete is greatly shortened by adding the accelerating agent, and the quicklime powder and the alum soil can play a role in stabilizing materials in the accelerating concrete slurry, so that the viscosity is improved, and further, when the forming time of the double-limb pier stud is shortened, the compaction degree and the product quality after the double-limb pier stud is formed are effectively ensured, and the passing rate of acceptance is improved.

Preferably, in the step S200, the time for the stirring device to stir the quick-setting concrete raw material exceeds 30min, and the time for the stirring device to stir the quick-setting concrete raw material exceeds 6 min.

Through adopting above-mentioned technical scheme, abundant stirring time can effectively ensure the consistency of rapid hardening concrete and accelerator to improve the combination degree of each raw materials of the two in the stirring process, and then when effectively shortening the bipedal pier stud shaping time, greatly ensured the quality stability after the formation of bipedal pier stud.

Preferably, in the step S200, the quick-setting concrete further includes a dry powder type interface agent, and a weight ratio of the dry powder type interface agent to the rubber powder is 0.3: 1.

By adopting the technical scheme, the dry powder type interface agent can be rapidly and uniformly stirred with water, the effect of improving the bonding firmness can be achieved in the quick-setting concrete, the bonding strength of the quick-setting concrete can be further improved along with the increase of the quantity of the dry powder type interface agent, and the quality stability of the formed double-limb pier stud is further effectively ensured; meanwhile, the double-limb pier stud can effectively improve the water resistance and the aging resistance of the quick-setting concrete, and further effectively ensures the service life and the use stability of the quick-setting concrete.

Preferably, the following steps are added in step S300: s310, during the curing period of the quick-setting concrete, constructors need to lift the curing film at intervals of 4 hours, and water is sprayed on the quick-setting concrete through a water spraying device for maintenance; and then covering the outer surfaces of the quick-setting concrete and the template with the health preserving film, and sprinkling water on the top wall of the health preserving film in due time.

By adopting the technical scheme, the curing film can reduce the phenomenon that the moisture in the rapid hardening concrete is volatilized too fast outwards, so that the forming stability of the rapid hardening concrete is effectively guaranteed, and the phenomenon that the rapid hardening concrete cracks in the forming process is reduced; the water sprayed on the outer surface of the quick-setting concrete can provide humidity for the continuously solidified quick-setting concrete, and the phenomenon that the outer surface of the quick-setting concrete cracks due to the fact that the quick-setting concrete absorbs heat too fast is effectively reduced.

Preferably, in the step S300, the constructor needs to remove the positioning bolt first and then remove the locking bolt; before the formwork is separated from the quick-setting concrete, constructors can knock the outer side wall of the formwork through cork hammers so as to accelerate the separation speed of the formwork and the quick-setting concrete block.

By adopting the technical scheme, the positioning bolt is firstly removed to separate the bottom plate of the template from the ground, and then the scraping and damaging phenomena of the template main body and the outer surfaces of the double-limb pier stud can be effectively reduced when the bottommost template is removed; after the cork hammer strikes the template, a void phenomenon is easy to occur between the template and the double-limb pier stud, so that the template is easy to be quickly separated from the outer surface of the double-limb pier stud, and the speed and the efficiency of a constructor in the process of dismantling the template are effectively improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the rapid-hardening concrete greatly shortens the molding period of the double-limb pier stud and effectively ensures the smooth promotion of the construction progress by increasing the cement consumption and using the dual acceleration of the rapid-hardening agent;

2. the high-specification quick-setting concrete raw material effectively improves the combination degree of the quick-setting concrete during stirring, and further effectively ensures the stability and the service life of the formed double-limb pier stud.

Drawings

Fig. 1 is a schematic structural diagram for showing the positional relationship among a double-limb pier stud, a template and a side support device in the construction process of the ultra-small interval double-limb pier stud according to the embodiment of the application;

fig. 2 is an enlarged schematic view of a portion a in fig. 1.

Description of reference numerals: 1. a double limb pier stud; 101. positioning holes; 2. a template; 201. a convex strip; 202. a through groove; 203. locking the bolt; 3. a side bracing device; 301. a bottom supporting plate; 302. connecting columns; 303. a butt joint plate; 304. and (6) positioning the bolt.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses a construction process of an ultra-small interval double-limb pier stud. Referring to fig. 1-2, the construction method comprises the following construction steps:

s100, referring to the figure 1, the construction area of the double-limb pier stud 1 is defined on the construction site through a tape according to the construction drawing. The construction boundary line defined by the marks takes the ground of the javelin as a mark, and the warning lines are pulled up between the adjacent javelins for isolation. A positioning hole 101 for pouring the double-limb pier stud 1 is dug in the circle area through an excavator, and the digging depth of the positioning hole 101 needs to exceed 5 m.

Referring to fig. 1, after the pilot hole 101 is excavated, a constructor may go down into the pilot hole 101 to clean the protruded stones and impurities, and then fill the pilot hole 101 with a solid steel plate by a crane to press the inner bottom wall of the pilot hole 101 and tamp the base thereof. Accessible bolt fastening between the diapire in solid steel sheet and the locating hole 101 runs through solid steel sheet through the bolt and squeezes into inside the soil to improve the horizontal degree of diapire in the locating plate, and then with the position stability after improving the pouring of double limb pier stud 1. Constructors can smooth the convex part of the inner side wall of the positioning hole 101 through the scraper and backfill soil for the concave part, so that the same inner side wall of the positioning hole 101 is located on the same longitudinal surface everywhere.

Referring to fig. 1, a constructor marks the installation position of a formwork 2 around the circumference of a pilot hole 101, and when marking, it is required to ensure that the side wall of the formwork 2 facing the direction of the pilot hole 101 and the longitudinal side wall of the pilot hole 101 are in the same longitudinal plane, and then the constructor can pull and transport all the prefabricated formworks 2 to a construction site by a truck to prepare for installation.

Referring to fig. 1 and 2, when the formworks 2 are installed, two formworks 2 are taken as a group, and are firstly assembled and then uniformly fixed. Constructor can support the sand grip 201 of 2 width direction one sides of a template into the logical groove 202 of 2 width direction opposite sides of another template, and then so that two adjacent templates 2 preliminarily cup joint. Then, the locking bolt 203 is made to simultaneously penetrate through one side edge of the through groove 202 and the protruding strip 201 along the thickness direction of the formwork 2, and is screwed in a preset thread groove on the other side edge of the through groove 202, so that the protruding strip 201 is fixedly connected inside the through groove 202. In this embodiment, two adjacent formworks 2 are provided with four locking bolts 203 in the height direction thereof, so as to ensure the connection strength of the adjacent formworks 2.

After two adjacent formworks 2 are assembled and fixed, a constructor needs to perform sealing treatment on the joint of the two formworks 2. The constructor needs to fill the gap between the protruding strips 201 and the through grooves 202 with the alkali-free fiberglass mesh cloth, and compact the alkali-free fiberglass mesh cloth in the through grooves 202 with foreign objects. Then, the through groove 202 is filled with the ultraviolet curing glue and is easily irradiated by an ultraviolet searchlight so as to cure the ultraviolet curing glue. At this moment, the alkali-free glass fiber mesh cloth is fixedly connected to the inner cavity of the through groove 202, and constructors can squeeze glass cement along the outer surface of the ultraviolet curing cement through a cement gun and compact the glass cement by using a caulking ball, so that the gap of the adjacent formworks 2 at the joint is reduced, and the adaptation degree of the double-limb pier stud 1 and the formworks 2 during pouring is improved.

Referring to fig. 1 and 2, after the assembled formwork 2 is sealed, a constructor needs to fix the formwork 2 of the lowest layer on the ground. The bottom plate of the template 2 is placed at the marked position, the template 2 is finely adjusted, and the side wall of the template 2 facing the direction of the positioning hole 101 and the inner side wall of the positioning hole 101 are located on the same longitudinal surface. The form 2 is stably seated on the ground by passing through the bottom plate of the form 2 and extending to the inside of the ground through the set bolts 304. The adjacent template 2 is the overlap joint setting in right angle switching department, and the end wall butt of a template 2 is in the surface of another template 2 promptly, and then only need make sealing process in right angle switching department, the phenomenon that slurry exosmosis appears when can effectively reducing the double limb pier stud 1 and pouring.

Referring to fig. 1 and 2, when the templates 2 of the lowest layer are all fixed, the templates 2 start to be stacked upward in the height direction thereof. Firstly, a scaffold is built, and then the template 2 is continuously upwards folded through the scaffold. The formworks 2 are stacked in the height direction, the convex strips 201 at the bottom of one formwork 2 abut into the through grooves 202 at the top of the other formwork 2, and then the formworks 2 and the convex strips 201 are locked by the locking nuts to be fixed. After the formworks 2 in the height direction are stacked, sealing treatment is required to be carried out on the connection positions.

Referring to fig. 1 and 2, each layer of formwork 2 is stacked on the top wall of the lower layer of formwork 2 along the height direction, constructors need to set side supporting devices 3 on the ground to support the overlapped formwork 2, and the side walls of the formworks 2 adjacent to each other in the height direction are always located on the same longitudinal surface.

Referring to fig. 1 and 2, the side bracing device 3 comprises a bottom bracing plate 301, a connecting column 302 welded on the top wall of the bottom bracing plate 301 in an inclined manner, and a butt plate 303 welded at one end of the connecting column 302 far away from the bottom bracing plate 301, wherein the butt plate 303 extends along the longitudinal direction. Constructor can adjust bottom bracing board 301's position subaerial, until butt plate 303 supports tightly in the junction of adjacent template 2, and then reaches the effect that makes butt plate 303 side support in template 2 lateral wall. After the butt plate 303 abuts tightly, the constructor can penetrate the bottom supporting plate 301 through the clamping bolt and drive the bottom supporting plate 301 into the ground, so that the bottom supporting plate 301 is stably fixed on the ground, and at the moment, the position of the side supporting device 3 is stabilized.

S200, preparing raw materials for preparing the quick-setting concrete: pure and impurity-free human and animal drinking water, Portland cement with the strength grade of at least 52.5R, fine sand glue powder, engineering fine sand with the particle diameter of 50-70 meshes and an accelerating agent. Wherein, the drinking water for people and livestock is transported by a water pipe, the accelerating agent is prepared on site, and the rest raw materials are transported to a construction site by a truck for standby.

The raw materials required for preparing the accelerator are as follows: pure drinking water for human and livestock, alum mud, sodium carbonate blocks and quicklime powder. Constructors can adjust the weight ratio of 1:1: 0.5: 0.2 of alum sludge, sodium carbonate blocks, quicklime powder and pure human and animal drinking water are poured into a small-sized stirrer to be stirred for at least 6min to obtain viscous accelerator slurry, and the prepared accelerator slurry needs to be placed in a cool place for later use.

Mixing the components in a weight ratio of 18:95:11: 30: 0.5 of pure and impurity-free human and animal drinking water, portland cement, fine sand glue powder and engineering fine sand are poured into a stirring kettle in sequence and stirred. And adding the prepared accelerator slurry when the stirring of the stirring kettle is more than 15min and all the raw materials are in a viscous slurry state. And stirring for 10min again, and then putting the dry powder type interface agent into the stirring kettle to stir for at least 5 min. The weight ratio of the dry powder type interfacial agent to the rubber powder is 0.3:1, and the stirring time of the stirring kettle is required to be at least more than 30 min. The prepared quick-setting concrete needs to be placed in a cool place for storage.

S300, pouring rapid-hardening concrete into a cavity surrounded by the templates 2, and stacking the rapid-hardening concrete upwards from the bottom wall of the positioning hole 101 until the rapid-hardening concrete is flush with the top wall of the highest layer of template 2. The quick-setting concrete roof of operating personnel accessible scraper blade floating, later locate the surface of quick-setting concrete and template 2 with the health preserving membrane cover to the quick-setting concrete health preserving.

During the curing period of the quick-setting concrete, constructors need to lift the curing film at intervals of 4 hours and spray water on the quick-setting concrete through a water spraying device for maintenance. And then covering the outer surfaces of the quick-setting concrete and the template 2 with the health preserving film again, and sprinkling water on the outer surface of the health preserving film at proper time.

And after the quick-setting concrete reaches a certain strength, removing the health preserving film and removing the templates 2 layer by layer according to the sequence from top to bottom. And after each higher layer of the formworks 2 is removed, the lower layer of the formworks 2 are removed, then the side supporting devices 3 are removed, and the scaffold is reserved so as to check the quality of the double-limb pier stud 1.

S400, observing whether the outer surface of the double-limb pier stud 1 is obviously damaged or not through naked eyes, and repairing with quick-setting concrete if the damage is found. Then, the thickness of the double limb pier 1 and the existence of a hollow inside the double limb pier 1 are detected by a high-frequency ultrasonic transducer. And (5) detecting the scaffold to be qualified, and dismantling the scaffold by constructors, checking, accepting and delivering.

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

Claims

1. The construction process of the ultra-small interval double-limb pier stud is characterized in that: the method comprises the following steps: s100, surveying and mapping the construction area of the double-limb pier stud (1), and excavating a positioning hole (101) for pouring the double-limb pier stud (1); determining and marking the installation positions of all the templates (2) around the periphery of the positioning hole (101), and then moving all the templates (2) to a construction site; abutting raised strips (201) which are matched with each other on two sides of the formwork (2) in the width direction against the through grooves (202) to assemble the adjacent formworks (2), simultaneously penetrating locking bolts (203) through one side wall of the through grooves (202) and the raised strips (201), and screwing one end of each locking bolt (203) in the length direction into a preset threaded groove in the other side wall of the through groove (202) in a threaded manner to fixedly connect the adjacent formworks (2); the assembly of the template (2) in the height direction is carried out in the same way; fixing the bottom plate of the template (2) on the ground at the marked position by a positioning bolt (304) for standby; s200, preparing the quick-setting concrete on site, wherein the weight ratio of the concrete to the concrete is 18:95:11: 30: respectively pouring 0.5 of water, portland cement, rubber powder, sand and an accelerating agent into a stirring device for stirring to prepare accelerating concrete for later use; s300, pouring rapid-hardening concrete into cavities of all the templates (2), and sleeving the rapid-hardening concrete and the outer surfaces of the templates (2) with a curing film; after the rapid hardening concrete reaches a certain strength, the health preserving film and all the templates (2) are dismantled; s400, observing whether the outer surface of the double-limb pier stud (1) is damaged or not, detecting the forming thickness of the double-limb pier stud (1) and the inner cavity phenomenon of the double-limb pier stud by using an ultrasonic device, and preparing for acceptance and delivery after the double-limb pier stud is detected to be qualified.

2. The construction process of the ultra-small space double-limb pier stud according to claim 1, which is characterized in that: the following steps are added in the step S100: s110, the digging depth of the positioning hole (101) needs to exceed 5m, after the digging of the positioning hole (101) is finished, a constructor needs to go down to the positioning hole (101) to clean hard stones, then the foundation is compacted, the inner side wall of the positioning hole (101) is adjusted through a scraper, and the vertical verticality and the levelness of the inner side wall of the positioning hole (101) are guaranteed.

3. The construction process of the ultra-small space double-limb pier stud according to claim 2, which is characterized in that: the following steps are added in the step S100: s120, filling gaps between the convex strips (201) and the through grooves (202) with alkali-free glass fiber mesh cloth, and then filling the through grooves (202) with glue; after the glue is solidified, glass cement is injected into the gap between the raised line (201) and the through groove (202) through a glue gun, and is compacted by a caulking ball; the adjacent formworks (2) are treated in the right-angle joint in the same way.

4. The construction process of the ultra-small space double-limb pier stud according to claim 3, which is characterized in that: the following steps are added in the step S100: s130, after each layer of templates (2) are stacked along the height direction, side supporting devices (3) are arranged on the ground to support the stacked templates (2); the side supporting device (3) comprises a bottom supporting plate (301), a connecting column (302) obliquely arranged on the top wall of the bottom supporting plate (301) and a butt joint plate (303) longitudinally arranged at one end, far away from the bottom supporting plate (301), of the connecting column (302); constructors can push the bottom supporting plate (301) on the ground so that the abutting plate (303) abuts against the outer side wall of the formwork (2) and further supports the formwork (2) by side; after butt joint board (303) offset with template (2) lateral wall, constructor accessible joint bolt is with bottom fagging (301) and ground fixed connection.

5. The construction process of the ultra-small space double-limb pier stud according to claim 1, which is characterized in that: in the step S200, the water is pure and impurity-free drinking water for people and livestock; the strength of the portland cement is at least 52.5R; the rubber powder is fine sand rubber powder; the sand is engineering fine sand with the particle diameter of 50-70 meshes.

6. The construction process of the ultra-small space double-limb pier stud according to claim 5, which is characterized in that: in the step S200, the accelerator needs to be prepared on site, and the weight ratio of the accelerator to the accelerator is 1:1: 0.5: 0.2 of alum mud, sodium carbonate blocks, quicklime powder and pure drinking water for people and livestock are poured into a stirring device to be stirred and thickened, so as to prepare the accelerating agent.

7. The construction process of the ultra-small space double-limb pier stud according to claim 6, which is characterized in that: in the step S200, the time for the stirring device to stir the quick-setting concrete raw material is more than 30min, and the time for the stirring device to stir the quick-setting concrete raw material is more than 6 min.

8. The construction process of the ultra-small space double-limb pier stud according to claim 7, which is characterized in that: in the step S200, the quick-setting concrete also contains a dry powder type interface agent, and the weight ratio of the dry powder type interface agent to the rubber powder is 0.3: 1.

9. The construction process of the ultra-small space double-limb pier stud according to claim 1, which is characterized in that: the following steps are added in the step S300: s310, during the curing period of the quick-setting concrete, constructors need to lift the curing film at intervals of 4 hours, and water is sprayed on the quick-setting concrete through a water spraying device for maintenance; and then, covering the outer surfaces of the quick-setting concrete and the template (2) with the health-preserving film, and sprinkling water on the top wall of the health-preserving film at a proper time.

10. The construction process of the ultra-small space double-limb pier stud according to claim 9, which is characterized in that: in the step S300, a constructor needs to firstly remove the positioning bolt (304) and then remove the locking bolt (203); before template (2) and rapid hardening concrete separation, constructor accessible cork hammer strikes template (2) lateral wall to accelerate template (2) and the separation rate of rapid hardening concrete block.