CN113585281B

CN113585281B - Foundation pit supporting beam concrete cushion and asphalt combined demolding construction method

Info

Publication number: CN113585281B
Application number: CN202110834346.1A
Authority: CN
Inventors: 左人宇; 李凯; 吴胤; 雷斌; 袁甲; 黄凯; 王健; 童心
Original assignee: Shenzhen Nanshan District Construction Project Quality Supervision And Inspection Station; Shenzhen Gongkan Geotechnical Group Co Ltd
Current assignee: Shenzhen Nanshan District Construction Project Quality Supervision And Inspection Station; Shenzhen Gongkan Geotechnical Group Co Ltd
Priority date: 2021-07-22
Filing date: 2021-07-22
Publication date: 2022-09-02
Anticipated expiration: 2041-07-22
Also published as: CN113585281A

Abstract

The invention relates to the technical field of building construction, and discloses a combined demolding construction method for a concrete cushion layer and asphalt of a foundation pit supporting beam. S100: excavating a supporting beam groove; s200: tamping a supporting beam bottom foundation; s300: paving a cushion layer side template; s400: pouring a plain concrete cushion layer; s500: coating asphalt release agent on the cushion layer, removing oil stains, dust, sand grains and water impurities on the surface of the cushion layer after the cushion layer concrete is initially set, and timely coating asphalt; s600: binding supporting beam steel bars and supporting templates; s700: pouring supporting beam concrete; s800: and (5) demolding the cushion layer after the next layer of earthwork is excavated. Coating a layer of asphalt as a release agent on the concrete cushion, and binding supporting beam steel bars, supporting a formwork and pouring concrete on the asphalt coating after the asphalt is dried; when the supporting beam is excavated below the earth, the natural isolation and lubrication functions of the asphalt can play a role of a concrete release agent, so that the concrete cushion layer can fall off naturally, and the release effect is good.

Description

Foundation pit supporting beam concrete cushion and asphalt combined demolding construction method

Technical Field

The invention relates to the technical field of building construction, in particular to a combined demolding construction method for a concrete cushion layer and asphalt of a foundation pit supporting beam.

Background

For the construction of a supporting beam for supporting a foundation pit, an earth-formwork method is generally adopted, namely after the foundation pit is excavated to the elevation position of the bottom of the supporting beam, the foundation soil at the bottom of the supporting beam is tamped and compacted, a template is laid on the foundation to serve as a concrete supporting beam pad, an oil felt is laid on the template to serve as a release agent, and then steel bars are bound, the template is erected, and the supporting beam concrete is poured.

However, when the supporting beam is constructed by adopting an earth model method, the templates are complicated to splice, the felt is difficult to fix, when reinforcing steel bars are bound and concrete is poured, the templates are easy to move and the felt is easy to damage, so that the concrete is directly contacted with the templates, and the demolding of the bottom template is difficult when the lower layer of earthwork of the foundation pit is excavated. If the templates are not cleared away in time, when the lower foundation pit earth excavation and foundation construction are carried out, the templates often fall off to cause personnel injury accidents, so that major potential safety hazards are brought to foundation engineering construction, moreover, the asphalt felts are not easy to fall off and difficult to clear, and the construction attractiveness is greatly influenced.

Therefore, a combined demolding construction method of the foundation pit supporting beam concrete cushion and the asphalt is provided.

Disclosure of Invention

The invention aims to provide a combined demolding construction method for a foundation pit supporting beam concrete cushion and asphalt, and aims to solve the problems that demolding is not clean due to the fact that concrete directly contacts a template, personnel injury accidents are caused by excavation of a lower foundation pit earthwork and falling of a foundation construction template, and construction attractiveness is greatly influenced due to the fact that an oil felt is not prone to falling and is difficult to clean.

In order to achieve the purpose, the invention provides the following technical scheme: the construction method for the combined demolding of the concrete cushion layer of the foundation pit supporting beam and the asphalt comprises the following construction steps:

s100: excavating a supporting beam groove, measuring and setting out the position of the supporting beam according to a design drawing, and widening the dimension of each side of an on-site excavation line by at least 20cm compared with the dimension of the designed beam;

s200: tamping a supporting beam bottom foundation, adopting a tamping machine to tamp the beam bottom foundation in a layering and subsection mode, and adopting sandy soil to replace and fill when a bad soil layer of silt, silt clay and organic soil is encountered, and tamping in a layering mode;

s300: laying a cushion layer side template, measuring and positioning the bottom position of the supporting beam again after the foundation is tamped, and laying the cushion layer side template;

s400: pouring a plain concrete cushion layer, wherein the cushion layer is made of C15 plain concrete with the thickness of 8cm, removing sundries such as garbage, mud and the like in the template before pouring, continuously paving the concrete from one end to the other end during pouring, and conveying the concrete by using a top-pump distributing machine;

s500: coating asphalt release agent on the cushion layer, removing oil stains, dust, sand grains and water impurities on the surface of the cushion layer after the cushion layer concrete is initially set, and timely coating asphalt;

s600: binding supporting beam reinforcing steel bars and supporting templates, checking the grade, the model, the size and the number of the reinforcing steel bars before binding the supporting beam reinforcing steel bars, and ensuring that the reinforcing steel bars are the same as a design drawing and a processing batching sheet;

s700: pouring supporting beam concrete, and pouring the supporting beam concrete into the reinforcement cages between the supporting formworks by utilizing concrete pumping equipment;

s800: and (4) demolding the cushion layer after the next layer of earthwork is excavated, continuously excavating the next layer of earthwork after the supporting beam is maintained, and naturally falling off the cushion layer when the next layer of earthwork is excavated to the position below the supporting beam and then transporting the cushion layer and the earthwork together.

Further, in the step S100, after the position of the supporting beam is determined when the beam groove is excavated, excavating to a position 20-30 cm above the elevation of the bottom of the supporting beam by using an excavator, and then manually cleaning soil to a designed elevation; and then removing the floating soil, excavating to the elevation of the supporting beam, removing floating slag in the range of the supporting beam, and ensuring the flatness.

Further, in the construction step S500, the brushing notice of the asphalt is as follows:

1) after the strength of the cushion concrete reaches 85%, coating the cushion asphalt;

2) before brushing, preparing the asphalt by using the Tianna water in a matching way, and strictly adjusting the asphalt and the Tianna water according to the proportion of 2: 3;

3) ensuring that the asphalt of the cushion layer is coated and rolled uniformly at one time, and making the asphalt of the cushion layer without missing coating, leaking bottom and pocking mark, and carrying out secondary rolling on individual weak positions;

4) before spraying and coating asphalt, keeping the cushion layer dry and clean;

5) the asphalt may be banded at its upper end after curing.

Further, the construction steps for pouring the concrete of the support beam in step S700 are as follows:

s710: before concrete is poured, oil stains on garbage, soil and steel bars in the template are removed;

s720: pouring concrete by adopting a ground pump or a top pump and manually matching, wherein the pouring adopts layered and segmented pouring, and vibrating is carried out while pouring;

s730: and after the concrete is poured and sufficiently vibrated, timely maintaining.

Further, the side forms are connected fixedly through fixed curb plate, the opening has been seted up on the lateral wall of fixed curb plate, be provided with the direction slide bar between the both sides inner wall of opening, the movable block has been cup jointed in the activity respectively on the both sides outer wall of direction slide bar, the winding is provided with coupling spring on the direction slide bar outer wall between the movable block, and the one end of movable block extends to the opening outside, its end fixedly connected with connecting block respectively, be provided with integrative spacing fixture block on the terminal outer wall of connecting block respectively, the fixed side forms of block respectively on the outer wall of spacing fixture block, the clearance between side forms side wall is used for pouring the bed course concrete, and place the pitch spraying ware above it and carry out the pitch spraying after the bed course concrete sets.

Further, the one end of limit die plate is provided with the cavity, and the cavity is used for the spacing fixture block of block, and is provided with the spacing groove on the bottom plate of cavity, and the inner chamber activity block of spacing groove has the staple, and the top of staple is provided with the wedge, and the terminal upper and lower both ends of spacing fixture block are the wedge structure, its and wedge phase-match, and the winding is provided with reset spring on the staple outer wall of wedge lower extreme, and when reset spring kept normal diastole state, the staple was accomodate in the spacing groove port.

Further, be provided with fixed clamshell on the outer wall of fixed curb plate keep away from side forms board one side, the inside take-up reel that is provided with of fixed clamshell, two haulage ropes have been rolled up respectively in the wire casing of take-up reel, the haulage rope extends out the winding assembly pulley setting from the port of fixed clamshell, its end difference fixed connection is on the relative lateral wall of movable block, and be provided with the rotary rod on one side outer wall of take-up reel, the rotary rod extends to the outside of fixed clamshell, its terminal swing joint has the movable rod, the end of movable rod is provided with the fixed suction cup.

Further, fixed clamshell sets up on the fixed curb plate outer wall of opening top, and the fixed curb plate outer wall both sides of opening below fixedly connected with fixing support respectively, and the fixed curb plate outer wall of fixing support upper end is provided with the scale mark, and the setting of opening port is pressed close to the scale mark.

Further, the pitch sprayer is including the storage jar that is used for the storage to adapt back pitch, the bottom one end both sides of storage jar are provided with little drive wheel respectively, little drive wheel is kept away from to the storage jar, on the both sides outer wall of one end respectively fixedly connected with remove the handle, the bottom swing joint who removes the handle has the spliced pole, the lower extreme activity of spliced pole is cup jointed in the spacing section of thick bamboo inner chamber on screw sleeve top, and screw sleeve's lower extreme screw thread cup joints on the outer wall of support stud, the support of the big drive wheel of lower extreme fixed connection of support stud.

Further, the storage jar is kept away from and is provided with the pumping piece near bottom department on the outer wall of removal handle one side, pumping piece input extends to storage jar inner chamber, and pumping piece output end fixedly connected with conveyer pipe, the terminal fixedly connected with shower nozzle of conveyer pipe, be provided with the fixed block on the shower nozzle outer wall of conveyer pipe both sides respectively, fixed block fixed connection pumping piece and shower nozzle, the shower nozzle is kept away from and is provided with the flattening scraper blade on one side outer wall of pumping piece, be provided with the flattening cylinder through the support on the flattening scraper blade is close to one side outer wall of shower nozzle.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention provides a combined demolding construction method of a foundation pit supporting beam concrete cushion and asphalt, which comprises the steps of brushing a layer of asphalt as a demolding agent on the concrete cushion, binding supporting beam steel bars, supporting a mold and pouring concrete on an asphalt coating after the asphalt is dried; when the supporting beam is excavated below the earth, the natural isolation and lubrication functions of the asphalt can play a role of a concrete release agent, so that the concrete cushion layer can fall off naturally, and the release effect is good.

2. According to the construction method for combined demolding of the concrete cushion layer and the asphalt of the foundation pit supporting beam, the plain concrete cushion layer is laid at the bottom of the supporting beam, the flatness of the plain concrete cushion layer can be accurately controlled, then the plain concrete cushion layer is coated with the thin asphalt of only a few millimeters, and demolding is performed quickly after excavation, so that the smooth and flat bottom surface of the supporting beam can be controlled, and the construction appearance quality of the supporting beam is improved.

3. According to the construction method for combined demolding of the concrete cushion layer of the foundation pit supporting beam and the asphalt, the asphalt is coated on the concrete cushion layer as the demolding agent, so that the concrete cushion layer of the supporting beam is rapidly and thoroughly dismantled when the earth below the beam is excavated, and the problems that the concrete of the supporting beam is adhered to a template in the construction of the traditional earth model method, and the demolding and sudden falling damage are not easy to happen are solved; the asphalt material coated with the paint is cheap, the later-stage demolding effect is good, the investment of construction machines and workers is reduced, the construction progress is accelerated, and the construction comprehensive cost is effectively reduced.

Drawings

FIG. 1 is a process flow diagram of the construction method for the combined demoulding of the concrete cushion layer of the foundation pit supporting beam and asphalt according to the invention;

FIG. 2 is a schematic view of asphalt coating notice of the construction method for combined stripping of the concrete cushion of the foundation pit supporting beam and asphalt according to the present invention;

FIG. 3 is a concrete pouring flow chart of the construction method for demolding the concrete cushion of the foundation pit supporting beam and asphalt in combination;

FIG. 4 is a schematic view of a side formwork fixing and mounting structure of the foundation pit supporting beam concrete cushion and asphalt combined demolding construction method of the invention;

FIG. 5 is an enlarged schematic structural view of the portion A in FIG. 4 of the foundation pit supporting beam concrete cushion and asphalt combined demolding construction method of the invention;

FIG. 6 is a schematic view of a connection structure of a side template and a limiting fixture block in the foundation pit supporting beam concrete cushion and asphalt combined demolding construction method of the invention;

FIG. 7 is a partial cross-sectional view of the side forms of the foundation pit bracing beam concrete cushion and asphalt combined demolding construction method of the invention;

FIG. 8 is a schematic structural diagram of an asphalt sprayer for the construction method for combined demolding of the concrete cushion of the foundation pit supporting beam and asphalt according to the invention;

fig. 9 is an enlarged structural schematic view of a part B in fig. 8 of the foundation pit supporting beam concrete cushion and asphalt combined demolding construction method of the invention.

In the figure: 1. a side template; 101. a cavity; 102. a limiting groove; 103. fixing nails; 104. a wedge block; 105. a return spring; 2. fixing the side plate; 3. a port; 4. a guide slide bar; 5. a moving block; 6. a connecting spring; 7. connecting blocks; 8. a limiting clamping block; 9. an asphalt sprayer; 91. storing the tank; 92. a small drive wheel; 93. moving the handle; 94. connecting columns; 95. a threaded sleeve; 96. a limiting cylinder; 97. a support stud; 98. a large drive wheel; 99. a pumping element; 910. a delivery pipe; 911. a spray head; 912. a fixed block; 913. leveling a scraper plate; 914. a leveling roller; 10. fixing the housing; 11. a take-up reel; 12. a hauling rope; 13. rotating the rod; 14. a movable rod; 15. fixing the sucker; 16. a fixed support; 17. and (5) marking scales.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and 2, the method for combined demolding construction of the concrete cushion of the foundation pit supporting beam and the asphalt comprises the following construction steps:

s100: excavating a supporting beam groove, measuring and paying off the position of the supporting beam according to a design drawing, and widening the size of each side of an on-site excavation line to be at least 20cm larger than that of the designed beam; when a beam groove is excavated, after the position of a supporting beam is determined, excavating to a position 20-30 cm above the elevation of the bottom of the supporting beam by using an excavator, and then manually cleaning soil to a designed elevation; then removing the floating soil, excavating to the elevation of the supporting beam, removing floating slag in the range of the supporting beam, and ensuring the flatness;

s200: tamping a supporting beam bottom foundation, adopting a tamping machine to tamp the beam bottom foundation in a layering and subsection manner, and adopting sandy soil to replace and fill when a bad soil layer of silt, muddy clay and organic soil is encountered, and tamping in a layering manner;

s300: paving a cushion layer side template 1, measuring and positioning the bottom position of the supporting beam again after the foundation is tamped, and paving the cushion layer side template 1;

s500: coating an asphalt release agent on a cushion layer, removing oil stains, dust, sand grains and water impurities on the surface of the cushion layer after the concrete of the cushion layer is initially set, coating asphalt in time, coating a layer of asphalt on the concrete cushion layer as the release agent, and binding supporting beam steel bars, supporting molds and pouring concrete on the asphalt coating layer after the asphalt is dried; when the earth below the supporting beam is excavated, the natural isolation and lubrication functions of the asphalt can play a role of a concrete release agent, so that a concrete cushion layer can naturally fall off, and the release effect is good;

s800: and (4) demolding the bedding layer after the next layer of earthwork is excavated, continuously excavating the next layer of earthwork after the supporting beam maintenance is finished, and naturally falling off the bedding layer when the earthwork is excavated to the position below the supporting beam and then transporting the bedding layer and the earthwork outwards together.

In the construction step S500, the brushing precautions for the asphalt are as follows:

1) coating the cushion asphalt after the strength of the cushion concrete reaches 85%;

2) mixing the asphalt and the Tianna water according to a ratio of 2:3 strictly before brushing;

5) the asphalt may be banded at its upper end after curing.

Referring to fig. 1 and 3, the construction steps for pouring the concrete of the support beam in step S700 are as follows:

s720: pouring concrete by adopting a ground pump or a top pump and manually matching, wherein the pouring adopts layered and segmented pouring, and the pouring is carried out while vibrating;

Referring to fig. 1, 4, 5 and 6, the side forms 1 are fixedly connected by a fixed side plate 2, a through opening 3 is formed on the side wall of the fixed side plate 2, a guide slide bar 4 is arranged between the inner walls of the two sides of the through opening 3, moving blocks 5 are respectively movably sleeved on the outer walls of the two sides of the guide slide bar 4, a connecting spring 6 is wound on the outer wall of the guide slide bar 4 between the moving blocks 5, when the connecting spring 6 is in a micro-compression state, the moving block 5 is positioned at two ends of the guide sliding rod 4, one end of the moving block 5 extends to the outside of the through opening 3, its end is fixedly connected with connecting block 7 respectively, is provided with integrative spacing fixture block 8 on the terminal outer wall of connecting block 7 respectively, and the fixed limit template 1 of block respectively on the outer wall of spacing fixture block 8, the clearance between 1 lateral walls of limit template is used for pouring the bed course concrete, and places pitch sprayer 9 above it after the bed course concrete setting and carry out the pitch spraying.

A fixed shell cover 10 is arranged on the outer wall of one side, away from the side template 1, of the fixed side plate 2, a winding roll 11 is arranged inside the fixed shell cover 10, two traction ropes 12 are wound in wire grooves of the winding roll 11 respectively, the traction ropes 12 extend out of a port of the fixed shell cover 10 and are wound by pulley blocks, the tail ends of the traction ropes are fixedly connected to the opposite side walls of the moving block 5 respectively, a rotating rod 13 is arranged on the outer wall of one side of the winding roll 11, the rotating rod 13 extends to the outside of the fixed shell cover 10, the tail end of the rotating rod is movably connected with a movable rod 14, and a fixed sucker 15 is arranged at the tail end of the movable rod 14; fixed clamshell 10 sets up on 2 outer walls of fixed curb plate above opening 3, and 2 outer walls of fixed curb plate both sides of opening 3 below fixedly connected with fixing support 16 respectively, 2 outer walls of fixed curb plate of fixing support 16 upper end are provided with scale marking 17, scale marking 17 presses close to opening 3 port setting, rotatory movable rod 14 promotes rotary rod 13 and drives take-up reel 11 and receive and release two haulage ropes 12, haulage rope 12 cooperates connecting spring 6 control movable block 5 respectively and controls about guide slide bar 4, the distance between accurate regulation movable block 5 fixes a position 1 interval of its limit template of connecting, reverse book movable rod 14 after adjusting utilizes its terminal fixed suction cup 15 to adsorb fixed clamshell 10, realize 1 quick location regulation of limit template.

Referring to fig. 6 and 7, one end of the side die plate 1 is provided with a cavity 101, the other end of the side die plate is provided with a limiting clamping block 8 which is the same as the outer wall of the connecting block 7, the cavity 101 is used for clamping the limiting clamping block 8, the upper end of the bottom plate of the cavity 101 is provided with a limiting groove 102, the inner cavity of the limiting groove 102 is movably clamped with a fixing nail 103, the top of the fixing nail 103 is provided with a wedge-shaped block 104, the upper end and the lower end of the tail end of the limiting clamping block 8 are both in a wedge-shaped structure which is matched with the wedge-shaped block 104, the outer wall of the fixing nail 103 at the lower end of the wedge-shaped block 104 is wound with a return spring 105, when the return spring 105 keeps a normal relaxation state, the fixing nail 103 is accommodated in the port of the limiting groove 102, the limiting clamping block 8 slides along the inclined plane of the wedge-shaped block 104 after extending into the cavity 101, the return spring 105 is pressed downwards to push the fixing nail 103 to extend to the outside of the port of the limiting groove 102, after the side die plate 1 and the connecting block 7 are clamped and butted, the fixing nail 103 is nailed into the tamped soil layer to fix the tamping nail, and then the rest side formworks 1 are sequentially butted, so that the stabilization and the firmness are realized, and the movement of the side formworks during the pouring of the cushion concrete is avoided.

Referring to fig. 8 and 9, the asphalt sprayer 9 includes a storage tank 91 for storing the adjusted asphalt, two sides of one end of the bottom of the storage tank 91 are respectively provided with a small driving wheel 92, the storage tank 91 is far away from the small driving wheel 92, two outer walls of two sides of one end are respectively and fixedly connected with a movable handle 93, the bottom of the movable handle 93 is movably connected with a connecting column 94, the lower end of the connecting column 94 is movably sleeved in an inner cavity of a limiting cylinder 96 at the top end of a threaded sleeve 95, the lower end of the threaded sleeve 95 is in threaded sleeve connection with the outer wall of a support stud 97, and the lower end of the support stud 97 is fixedly connected with a support of a large driving wheel 98; a pumping part 99 is arranged on the outer wall of one side of the storage tank 91 far away from the movable handle 93 and close to the bottom, the input end of the pumping part 99 extends to the inner cavity of the storage tank 91, the output end of the pumping part 99 is fixedly connected with a delivery pipe 910, the tail end of the delivery pipe 910 is fixedly connected with a spray head 911, the outer walls of the spray heads 911 on two sides of the delivery pipe 910 are respectively provided with a fixed block 912, the fixed blocks 912 are fixedly connected with the pumping part 99 and the spray head 911, the outer wall of one side of the spray head 911 far away from the pumping part 99 is provided with a leveling scraper 913, the outer wall of one side of the leveling scraper 913 close to the spray head 911 is provided with a leveling roller 914 through a bracket, the length of the leveling roller 95 and the length of the supporting stud 97 are adjusted by rotating the threaded sleeve 95, the movable handle 93 is driven to shift up and down, thereby driving the storage tank 91 to shift the spraying direction of the spray head 911 on the outer wall, the asphalt can be sprayed by the spray head 911 at multiple angles, and the asphalt can be sprayed by the spray head 911, hold and remove handle 93 and promote storage jar 91 and remove, flattening is carried out to flattening scraper blade 913 and flattening cylinder 914 the pitch of its spraying after shower nozzle 911 blowout pitch, guarantees the planarization of spraying pitch, avoids its outward appearance roughness and the aesthetic property that influences the supporting beam body.

The working principle is as follows: the technology of 'concrete cushion layer and asphalt base demoulding' is adopted, and mainly a low-grade plain concrete cushion layer is used for replacing a template paved on a base in the traditional soil mould method, asphalt is coated for replacing asphalt felt in the original process, and then steel bar binding, formwork supporting and concrete pouring are carried out on the asphalt. The key process is that the demoulding asphalt is coated on the surface of the concrete cushion layer, and a layer of uniform isolation film is formed on the surface of the support beam concrete cushion layer to play a role in lubrication and isolation, so that the adhesion force between the support beam concrete and the concrete cushion layer can be effectively reduced, and the cushion layer concrete can smoothly and naturally fall off when the next layer of earthwork is excavated.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The foundation pit supporting beam concrete cushion and asphalt combined demolding construction method is characterized by comprising the following construction steps:

s100: excavating a supporting beam groove, measuring and paying off the position of the supporting beam according to a design drawing, and widening the size of each side of an on-site excavation line to be at least 20cm larger than that of the designed beam;

s300: paving a cushion layer side template (1), measuring and positioning the bottom position of the supporting beam again after the foundation is tamped, and paving the cushion layer side template (1);

s400: pouring a plain concrete cushion layer, wherein the cushion layer is made of C15 plain concrete with the thickness of 8cm, removing garbage and soil sundries in the template before pouring, continuously paving the template from one end to the other end during pouring, and conveying the concrete by using an overhead pump distributing machine;

s600: binding supporting beam reinforcing steel bars and supporting templates, checking the grade, the model, the size and the quantity of the reinforcing steel bars before binding the supporting beam reinforcing steel bars, and ensuring that the reinforcing steel bars are the same as the design drawings and the processing batching sheets;

s800: demolding the cushion layer after the next layer of earthwork is excavated, continuously excavating the next layer of earthwork after the supporting beam is maintained, and naturally falling off the cushion layer when the next layer of earthwork is excavated to the position below the supporting beam and then transporting the cushion layer and the earthwork;

the side template (1) is connected and fixed through a fixed side plate (2), a through hole (3) is formed in the side wall of the fixed side plate (2), a guide slide bar (4) is arranged between the inner walls of two sides of the through hole (3), moving blocks (5) are respectively movably sleeved on the outer walls of two sides of the guide slide bar (4), a connecting spring (6) is wound on the outer wall of the guide slide bar (4) between the moving blocks (5), and one end of each moving block (5) extends to the outside of the through hole (3), the tail ends of the side formworks are respectively and fixedly connected with a connecting block (7), the outer walls of the tail ends of the connecting blocks (7) are respectively provided with an integrated limiting fixture block (8), the outer walls of the limiting fixture blocks (8) are respectively clamped and fixed with the side formworks (1), gaps between the side walls of the side formworks (1) are used for pouring cushion concrete, and an asphalt sprayer (9) is arranged above the concrete of the cushion layer for asphalt spraying after the concrete of the cushion layer is solidified.

2. The foundation pit supporting beam concrete cushion and asphalt combined demolding construction method as claimed in claim 1, wherein the method comprises the following steps: aiming at the step S100, after the position of a supporting beam is determined when a beam groove is excavated, excavating to a position 20-30 cm above the elevation of the bottom of the supporting beam by using an excavator, and then manually cleaning soil to the designed elevation; and then removing the floating soil, excavating to the elevation of the supporting beam, removing floating slag in the range of the supporting beam, and ensuring the flatness.

3. The foundation pit supporting beam concrete cushion and asphalt combined demolding construction method as claimed in claim 1, wherein the method comprises the following steps: in the construction step S500, the brushing care of the asphalt is as follows:

5) the asphalt may be banded at its upper end after curing.

4. The foundation pit supporting beam concrete cushion and asphalt combined demolding construction method as claimed in claim 1, wherein the method comprises the following steps: the construction steps for pouring the support beam concrete in the step S700 are as follows:

5. The foundation pit supporting beam concrete cushion and asphalt combined demolding construction method as claimed in claim 1, wherein the method comprises the following steps: one end of side template (1) is provided with cavity (101), cavity (101) are used for block spacing fixture block (8), and the bottom plate upper end of cavity (101) is provided with spacing groove (102), the inner chamber activity block of spacing groove (102) has staple (103), the top of staple (103) is provided with wedge (104), the last lower both ends of spacing fixture block (8) end are the wedge structure, it and wedge (104) phase-match, and the winding is provided with reset spring (105) on staple (103) outer wall of wedge (104) lower extreme, when reset spring (105) keep normal diastolic state, staple (103) are accomodate in spacing groove (102) port.

6. The foundation pit supporting beam concrete cushion and asphalt combined demolding construction method as claimed in claim 1, wherein: be provided with fixed clamshell (10) on the outer wall of side forms (1) one side is kept away from in fixed curb plate (2), fixed clamshell (10) inside is provided with take-up reel (11), two haulage ropes (12) have been rolled up respectively in the wire casing of take-up reel (11), haulage rope (12) extend out the winding assembly pulley setting from the port of fixed clamshell (10), its end is fixed connection respectively on the relative lateral wall of movable block (5), and be provided with rotary rod (13) on one side outer wall of take-up reel (11), rotary rod (13) extend to the outside of fixed clamshell (10), its end swing joint has movable rod (14), the end of movable rod (14) is provided with fixed suction cup (15).

7. The foundation pit supporting beam concrete cushion and asphalt combined demolding construction method as claimed in claim 6, wherein the method comprises the following steps: fixed clamshell (10) set up on fixed curb plate (2) outer wall of opening (3) top, and fixed curb plate (2) outer wall both sides of opening (3) below fixedly connected with fixing support (16) respectively, and fixed curb plate (2) outer wall of fixing support (16) upper end is provided with scale marking (17), and the setting of opening (3) port is pressed close to in scale marking (17).

8. The foundation pit supporting beam concrete cushion and asphalt combined demolding construction method as claimed in claim 1, wherein the method comprises the following steps: pitch sprayer (9) are including storage jar (91) that is used for the storage to adapt back pitch, the bottom one end both sides of storage jar (91) are provided with little drive wheel (92) respectively, little drive wheel (92) are kept away from in storage jar (91), respectively fixedly connected with removes handle (93) on the both sides outer wall of one end, the bottom swing joint who removes handle (93) has spliced pole (94), the lower extreme activity of spliced pole (94) is cup jointed in spacing section of thick bamboo (96) inner chamber on threaded sleeve (95) top, and the lower extreme screw thread of threaded sleeve (95) cup joints on the outer wall of support stud (97), the support of the big drive wheel of lower extreme fixed connection (98) of support stud (97).

9. The foundation pit supporting beam concrete cushion and asphalt combined demolding construction method as claimed in claim 8, wherein: the utility model discloses a storage jar (91) keep away from and be provided with pumping piece (99) near bottom department on the outer wall of removal handle (93) one side, pumping piece (99) input extends to storage jar (91) inner chamber, and pumping piece (99) output end fixedly connected with conveyer pipe (910), terminal fixedly connected with shower nozzle (911) of conveyer pipe (910), be provided with fixed block (912) on shower nozzle (911) outer wall of conveyer pipe (910) both sides respectively, fixed block (912) fixed connection pumping piece (99) and shower nozzle (911), be provided with flattening scraper blade (913) on one side outer wall that pumping piece (99) were kept away from in shower nozzle (911), flattening scraper blade (913) are provided with flattening cylinder (914) through the support on being close to one side outer wall of shower nozzle (911).