Column foot bolted prefabricated hollow square column type inspection pit capable of being constructed in forward direction

Abstract

A column foot bolted prefabricated hollow square column type inspection pit capable of being constructed in the forward direction belongs to a rail transit inspection pit and is formed by assembling a plurality of units, and each unit comprises a concrete cushion layer, a cast-in-place bottom plate unit, a prefabricated small stand column module, a prefabricated retaining wall module, a foundation anchor bolt module and a column bottom post-pouring concrete module. The utility model has the advantages that the bottom plate is divided into standard prefabricated bottom plate units, the upright post and the retaining wall are divided into a plurality of standard prefabricated modules, the component units and the modules are assembled and spliced by adopting splicing construction, and finally, the track mounting precision is controlled by adjusting the concrete pouring (coarse adjustment) of the bolt holes of the bottom plate and the leveling nuts (fine adjustment) of the bottoms of the upright posts.

Description

Technical Field

[0001] The utility model belongs to a rail transit inspection pit, in particular to a column type inspection pit capable of positively constructing column feet and bolting prefabricated hollow square columns. Background Art

[0002] At present, in the field of domestic rail transit, the column inspection pits used for parking and maintenance of high-speed trains, subway trains, etc. mostly adopt the integral cast-in-place solution, and some projects adopt assembled column inspection pits, but the construction method still adopts the traditional track erection method for reverse construction, that is, by using the steel rail "steel tire frame" as a temporary track support and fixing system, the track geometry is controlled "from top to bottom" by technical measures. The construction process includes track transportation, track erection, and track adjustment. This method can improve the installation accuracy of the track and reduce the difficulty of construction. The disadvantages are that there are many construction processes for erecting the track, the track bracket is easy to collapse, the requirements for the flatness of the bottom plate are high, and the track construction unit and the civil construction unit need to cross-operate. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned defects and provide a column-type inspection pit with prefabricated hollow square columns that can be bolted to the column base in a forward-construction manner. The base plate is divided into standard prefabricated base plate units, and the columns and retaining walls are divided into multiple standard prefabricated modules. The various component units and modules are assembled and spliced ​​by assembly construction, and finally the track installation accuracy is controlled by adjusting the concrete pouring of the base plate bolt holes (rough adjustment) and the leveling nuts at the bottom of the columns (fine adjustment).

[0004] The purpose of the utility model is achieved through the following technical solutions: a column-type inspection pit with prefabricated hollow square columns that can be bolted to column bases in a positive construction direction, characterized in that it is assembled from a plurality of units, each unit comprising a concrete cushion layer, a cast-in-place base plate unit, a prefabricated small column module, a prefabricated retaining wall module, a foundation anchor module and a column bottom post-cast concrete module, a cast-in-place base plate unit is installed on the concrete cushion layer, the cast-in-place base plate unit is composed of a concrete cast-in-place base plate, vertical steel bars reserved for retaining walls on the base plate and reserved foundation bolt holes on the base plate, a plurality of vertical steel bars reserved for retaining walls on the base plate are installed at intervals on opposite sides of the concrete cast-in-place base plate, and a plurality of base plates are arranged on the concrete cast-in-place base plate inside the vertical steel bars reserved for retaining walls on the base plate Anchor bolt holes are reserved, and the prefabricated retaining wall module is provided with hollow reserved holes. The vertical steel bars of the reserved retaining wall of the bottom plate are inserted into the hollow reserved holes of the prefabricated retaining wall module. The anchor bolts are installed in the reserved anchor bolt holes of the bottom plate, and cast-in-place concrete is poured once in the reserved anchor bolt holes of the bottom plate. The prefabricated small column module is installed above the reserved anchor bolt holes of the bottom plate, and the anchor bolts are connected to the prefabricated small column module. Secondary cast-in-place concrete is poured at the connection between the prefabricated small column module and the anchor anchor bolts. The prefabricated retaining wall modules near both sides of the cast-in-place bottom plate unit are respectively poured with bottom plate drainage ditch concrete layers, and a drainage ditch is formed between the bottom plate drainage ditch concrete layers on both sides in the middle of the cast-in-place bottom plate unit.

[0005] The double-layer bottom plate cast-in-place steel bars are laid in the cast-in-place concrete bottom plate.

[0006] The prefabricated small column module is composed of a prefabricated small column concrete module, prefabricated small column longitudinal reinforcement, prefabricated small column stirrups, a middle reserved hole, a prefabricated small column column bottom steel plate, a reserved anchor bolt hole of the column bottom steel plate and a reserved track fastener connecting sleeve. The prefabricated small column concrete module is provided with a hollow reserved hole, the prefabricated small column longitudinal reinforcement is fixedly installed on the inner circumference of the prefabricated small column concrete module, a plurality of prefabricated small column stirrups are arranged at intervals on the prefabricated small column longitudinal reinforcement, the prefabricated small column column bottom steel plate is installed at the bottom of the prefabricated small column concrete module, the prefabricated small column column bottom steel plate is provided with a reserved anchor bolt hole of the column bottom steel plate, the anchor bolt is connected with the reserved anchor bolt hole of the column bottom steel plate, and a reserved track fastener connecting sleeve with an internal thread is provided on the top of the prefabricated small column concrete module.

[0007] The prefabricated retaining wall module consists of a prefabricated retaining wall concrete module, prefabricated retaining wall vertical steel bars, prefabricated retaining wall horizontal steel bars, hollow reserved holes and prefabricated retaining wall top reserved holes. The prefabricated retaining wall concrete module is provided with a hollow reserved hole. The vertical steel bars of the retaining wall reserved in the bottom plate are inserted into the hollow reserved holes of the prefabricated retaining wall concrete module. The prefabricated vertical steel bars of the retaining wall are installed and fixed on the inner periphery of the prefabricated retaining wall concrete module. A plurality of horizontal prefabricated horizontal steel bars of the retaining wall are arranged at intervals on the vertical steel bars of the prefabricated retaining wall. The top of the prefabricated retaining wall concrete module is provided with a reserved hole. A pad is installed in the reserved hole. The vertical steel bars of the retaining wall reserved in the bottom plate pass through the pad and are fixed to the pad by nuts. A cement mortar layer is cast in the reserved hole.

[0008] The bottom of the prefabricated retaining wall concrete module is provided with a rough surface.

[0009] Both ends of the prefabricated retaining wall concrete module are provided with chamfers.

[0010] The anchor bolt consists of an anchor bolt, a steel anchor plate, a leveling nut and a double nut. The steel anchor plate is installed at the bottom of the anchor bolt. The anchor bolts are connected by a limit plate. A leveling nut spirally connected to the anchor bolt is installed below the limit plate. The anchor bolt passes through the anchor bolt hole reserved in the column bottom steel plate at the bottom of the prefabricated small column concrete module and is fixed by the double nut.

[0011] The beneficial effects of the utility model are:

[0012] In view of the current problems of prefabricated column inspection pits, such as the large number of reverse installation processes, certain safety hazards, and the intersection of track construction and civil construction, this application breaks through the original construction and installation plan and adopts forward construction, that is, the prefabricated components are completely assembled "from bottom to top" during construction, and the track installation method is eliminated; the column inspection pit floor is divided into standard prefabricated floor units, and the columns and retaining walls are divided into multiple standard prefabricated modules, and then assembly construction is adopted to assemble and splice the component units and modules. Finally, the track installation accuracy is controlled by adjusting the concrete pouring of the bottom plate bolt holes (rough adjustment) and the leveling nuts at the bottom of the columns (fine adjustment), thereby effectively solving the above-mentioned problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a top view of the standard cast-in-place base plate of the utility model.

[0014] Figure 2 yes Figure 1 1-1 cross-sectional view.

[0015] Figure 3 It is a schematic diagram of the structure of the prefabricated small column module of the utility model.

[0016] Figure 4 It is a schematic diagram of the module structure of the prefabricated retaining wall of the utility model.

[0017] Figure 5 yes Figure 3 2-2 cross-sectional view.

[0018] Figure 6 yes Figure 3 3-3 cross-sectional view.

[0019] Figure 7 yes Figure 6 ① is an enlarged structural diagram of part 1.

[0020] Figure 8 It is a schematic diagram of the structure of the anchor bolt module of the utility model.

[0021] Fig. 9 The utility model is a schematic diagram of the post-cast concrete module structure of the column bottom.

[0022] in:

[0023] 0-cast-in-place cushion layer, 1-cast-in-place base plate unit, 101-cast-in-place concrete base plate, 102-reserved vertical reinforcement of retaining wall in base plate, 103-cast-in-place reinforcement of base plate, 104-reserved anchor bolt holes in base plate, 2-prefabricated small column module, 201-prefabricated small column concrete module, 202-prefabricated small column longitudinal reinforcement, 203-prefabricated small column stirrups, 204-hollow reserved holes, 205-prefabricated small column column bottom steel plate, 206-reserved anchor bolt holes in column bottom steel plate, 207-reserved track fastener connection sleeve, 3-prefabricated retaining wall module, 301-prefabricated retaining wall concrete module, 302-prefabricated retaining wall vertical reinforcement, 303-prefabricated retaining wall Horizontal steel bars, 304-hollow reserved holes, 305-chamfers on both sides of the precast retaining wall, 306-rough surface at the bottom of the precast retaining wall, 307-precast retaining wall top reserved holes, 308-precast retaining wall top reserved holes M20 cement mortar sealing, 309-70*70*8 pads on the top of the vertical steel bars of the retaining wall, 310-M12 nuts on the top of the vertical steel bars of the retaining wall, 4-anchor bolt module, 401-anchor bolt, 402-steel anchor plate, 403-leveling nut, 404-double nut, 5-column bottom and drainage ditch post-cast concrete module, 501-first cast-in-place concrete, 502-second cast-in-place concrete, 503-bottom plate drainage ditch concrete layer. DETAILED DESCRIPTION

[0024] Embodiment: A column-type inspection pit with prefabricated hollow square columns that can be bolted to the column base in a positive construction direction is assembled from a number of units, each of which includes a concrete cushion layer 0, a cast-in-place bottom plate unit 1, a prefabricated small column module 2, a prefabricated retaining wall module 3, a ground anchor module 4 and a column bottom post-cast concrete module 5. The cast-in-place bottom plate unit 1 is cast on site on the concrete cushion layer 0. The cast-in-place bottom plate unit 1 is composed of a concrete cast-in-place bottom plate 101, a vertical steel bar 102 reserved for the retaining wall of the bottom plate, a cast-in-place steel bar 103 of the bottom plate and a bottom plate. The concrete base plate 101 is cast on the concrete cushion layer 0, and two layers of cast-in-place steel bars 103 of the base plate are tied. On the concrete cushion layer 0, a plurality of vertical steel bars 102 for the base plate reserved for retaining wall are installed at intervals on the two opposite sides of the cast-in-place concrete base plate 101. The cast-in-place concrete base plate 101 is cast on site, and four groups of symmetrically arranged base plate reserved anchor bolt holes 104 are positioned and reserved on the cast-in-place concrete base plate 101, and each group of base plate reserved anchor bolt holes consists of four anchor bolt holes 104.

[0025] The prefabricated retaining wall module 3 is composed of a prefabricated retaining wall concrete module 301, a prefabricated retaining wall vertical steel bar 302, a prefabricated retaining wall horizontal steel bar 303, a middle reserved hole 304, chamfers 305 on both sides of the prefabricated retaining wall, a rough surface 306 at the bottom of the prefabricated retaining wall, a prefabricated retaining wall top reserved hole 307, a prefabricated retaining wall top reserved hole M20 cement mortar seal 308, a retaining wall vertical steel bar top pad 309 and a retaining wall vertical steel bar top M12 nut 310, wherein the cement mortar 308, the retaining wall vertical steel bar top pad 309 and the retaining wall vertical steel bar top M12 nut 310 are On-site installation, the prefabricated retaining wall concrete module 301 is provided with a hollow reserved hole 304, the prefabricated retaining wall vertical steel bars 302 are fixedly installed on the inner circumference of the prefabricated retaining wall concrete module 301, a number of prefabricated retaining wall horizontal steel bars 303 are arranged at intervals on the prefabricated retaining wall vertical steel bars 302, a rough surface 306 is arranged at the bottom of the prefabricated retaining wall concrete module 301, a reserved hole 307 is arranged at the top of the prefabricated retaining wall concrete module 301, and chamfers 305 are arranged at both ends of the prefabricated retaining wall concrete module 301 to facilitate the splicing and sealing of two prefabricated retaining wall concrete modules 301;The above components are assembled and prefabricated in the factory. The vertical steel bars 102 reserved for the retaining wall in the bottom plate are inserted into the hollow reserved holes 304 of the prefabricated retaining wall concrete module 301. A 10 mm waterproof mortar layer (not shown in the figure) is laid at the bottom of the prefabricated retaining wall concrete module 301. A 70*70*8 pad 309 is installed in the reserved hole 307. The vertical steel bars 302 reserved for the retaining wall pass through the pad 309 and are fixed to the pad 309 by nuts 310. An M20 cement mortar layer 308 is cast on site in the reserved hole 307. The anchor bolt 4 consists of an anchor bolt 401, a steel anchor plate 402, and a leveling nut 403. and double nuts 404, a steel anchor plate 402 is installed at the bottom of the anchor bolt 401, the anchor bolt 4 is installed in the reserved anchor bolt hole 104 of the bottom plate, and a cast-in-place concrete 501 is poured in the reserved anchor bolt hole 104 of the bottom plate. The anchor bolts 401 are connected by a limit plate, and a leveling nut 403 is installed below the limit plate. The prefabricated small column module 2 consists of a prefabricated small column concrete module 201, a prefabricated small column longitudinal reinforcement 202, a prefabricated small column stirrup 203, a middle reserved hole 204, a prefabricated small column bottom steel plate 205, a reserved anchor bolt hole 206 of the column bottom steel plate and a reserved track fastener connecting sleeve 2 07, all the above components are assembled and prefabricated in the factory, the prefabricated small column concrete module 201 is provided with a hollow reserved hole 204, the inner circumference of the prefabricated small column concrete module 201 is fixedly installed with a prefabricated small column longitudinal reinforcement 202, a plurality of horizontal prefabricated small column stirrups 203 are arranged at intervals on the prefabricated small column longitudinal reinforcement 202, a prefabricated small column column bottom steel plate 205 is installed at the bottom of the prefabricated small column concrete module 201, and a column bottom steel plate reserved anchor bolt hole 206 is arranged on the prefabricated small column column bottom steel plate 205, and the prefabricated small column concrete module 201 is installed above the reserved anchor bolt hole 104 of the bottom plate, The two are aligned, the anchor bolt 401 passes through the reserved anchor bolt hole 206 of the column bottom steel plate and is fastened by a double nut 404. A reserved track fastener connection sleeve 207 with internal threads is provided on the top of the prefabricated small column concrete module 201, which is used to connect and fix with the rail through bolts. Secondary cast-in-place concrete 502 is poured at the connection between the prefabricated small column concrete module 201 and the anchor bolt 401 on the cast-in-place floor unit 1, and floor drainage ditch concrete 503 is poured near the prefabricated retaining wall modules 301 on both sides of the cast-in-place floor unit 1. A drainage ditch is formed between the floor drainage ditch concrete 503 on both sides in the middle of the cast-in-place floor unit 1. ;

[0026] Construction steps:

[0027] 1. Construct plain concrete cushion layer 0 in the foundation pit.

[0028] 2. Tie two layers of cast-in-place steel bars 103 of the bottom plate on the concrete cushion layer 0, locate and prefabricate the vertical steel bars 102 of the bottom plate reserved for retaining wall along the opposite sides of the concrete cushion layer 0, locate and set the reserved anchor bolt holes 104 of the bottom plate on the inner side of the prefabricated vertical steel bars 102 of the retaining wall, and cast the cast-in-place concrete bottom plate 101.

[0029] 3. Lay 10mm waterproof mortar at the corresponding position of the prefabricated retaining wall module 3, place the prefabricated retaining wall module 301, ensure that the vertical steel bars 102 of the retaining wall reserved in the bottom plate are inserted into the hollow reserved holes 304 in the retaining wall, and penetrate the 70*70*8 pads 309 on the top of the vertical steel bars of the retaining wall, fix them with the pads 309 through the M12 nuts 310 on the top, and pour the M20 cement mortar 308 on the top of the prefabricated retaining wall.

[0030] 4. The anchor bolts 4 are placed in the reserved anchor bolt holes 104 in the base plate. The anchor bolts 4 are connected by limit plates. The prefabricated small column module 2 is positioned and placed to ensure that the reserved anchor bolt holes 206 in the column bottom steel plate are aligned with the reserved anchor bolt holes 104 in the base plate. The anchor bolts 4 are inserted into the reserved anchor bolt holes 206 in the column bottom steel plate. The prefabricated small column module 2 is leveled for the first time using a total station. Cast-in-place concrete 501 is poured once. The leveling nuts 403 are adjusted. The prefabricated small column module 2 is leveled for the second time. After the track installation accuracy requirements are met, double nuts 404 are constructed. The second cast-in-place concrete 502 is poured. The base plate drainage ditch concrete 503 is constructed. At this point, the construction of the prefabricated assembled modular column inspection pit is completed.

[0031] The present application divides the base plate into standard prefabricated base plate units, divides the columns and retaining walls into multiple standard prefabricated modules, and then adopts assembly construction to assemble and splice the component units and modules. Finally, the track installation accuracy is controlled by adjusting the concrete pouring of the base plate bolt holes (rough adjustment) and the leveling nuts at the bottom of the columns (fine adjustment), thereby effectively solving the above-mentioned problems.

Claims

1. A column-type inspection pit with prefabricated hollow square columns that can be bolted to the column base in a positive construction direction, characterized in that: It is assembled from several units, each unit includes a concrete cushion layer, a cast-in-place base plate unit, a prefabricated small column module, a prefabricated retaining wall module, a foundation anchor module and a column bottom post-cast concrete module. The cast-in-place base plate unit is installed on the concrete cushion layer. The cast-in-place base plate unit is composed of a concrete cast-in-place base plate, a base plate reserved retaining wall vertical steel bar and a base plate reserved foundation bolt hole. A number of base plate reserved retaining wall vertical steel bars are installed at intervals on the opposite sides of the concrete cast-in-place base plate. A number of base plate reserved foundation bolt holes are arranged on the concrete cast-in-place base plate inside the base plate reserved retaining wall vertical steel bars. The prefabricated retaining wall module is provided with hollow reserved holes. The vertical steel bars of the retaining wall reserved in the bottom plate are inserted into the hollow reserved holes of the prefabricated retaining wall module, the anchor bolts are installed in the anchor bolt holes reserved in the bottom plate, and cast-in-place concrete is poured once in the anchor bolt holes reserved in the bottom plate. The prefabricated small column module is installed above the anchor bolt holes reserved in the bottom plate, and the anchor bolts are connected to the prefabricated small column module. Secondary cast-in-place concrete is poured at the connection between the prefabricated small column module and the anchor bolts. The prefabricated retaining wall modules near both sides of the cast-in-place bottom plate unit are respectively poured with bottom plate drainage ditch concrete layers, and a drainage ditch is formed in the middle of the cast-in-place bottom plate unit between the bottom plate drainage ditch concrete layers on both sides.

2. According to claim 1, the prefabricated hollow square column inspection pit with column foot bolted to the front construction is characterized by: The double-layer bottom plate cast-in-place steel bars are laid in the cast-in-place concrete bottom plate.

3. According to claim 1, the prefabricated hollow square column inspection pit with column foot bolted to the front construction is characterized by: The prefabricated small column module is composed of a prefabricated small column concrete module, prefabricated small column longitudinal reinforcement, prefabricated small column stirrups, a middle reserved hole, a prefabricated small column column bottom steel plate, a reserved anchor bolt hole of the column bottom steel plate and a reserved track fastener connecting sleeve. The prefabricated small column concrete module is provided with a hollow reserved hole, the prefabricated small column longitudinal reinforcement is fixedly installed on the inner circumference of the prefabricated small column concrete module, a plurality of prefabricated small column stirrups are arranged at intervals on the prefabricated small column longitudinal reinforcement, the prefabricated small column column bottom steel plate is installed at the bottom of the prefabricated small column concrete module, the prefabricated small column column bottom steel plate is provided with a reserved anchor bolt hole of the column bottom steel plate, the anchor bolt is connected with the reserved anchor bolt hole of the column bottom steel plate, and a reserved track fastener connecting sleeve with an internal thread is provided on the top of the prefabricated small column concrete module.

4. According to claim 1, the prefabricated hollow square column column inspection pit with forward-construction column foot bolt connection is characterized in that: The prefabricated retaining wall module consists of a prefabricated retaining wall concrete module, prefabricated retaining wall vertical steel bars, prefabricated retaining wall horizontal steel bars, hollow reserved holes and prefabricated retaining wall top reserved holes. The prefabricated retaining wall concrete module is provided with a hollow reserved hole. The vertical steel bars of the retaining wall reserved in the bottom plate are inserted into the hollow reserved holes of the prefabricated retaining wall concrete module. The prefabricated vertical steel bars of the retaining wall are installed and fixed on the inner periphery of the prefabricated retaining wall concrete module. A plurality of horizontal prefabricated horizontal steel bars of the retaining wall are arranged at intervals on the vertical steel bars of the prefabricated retaining wall. The top of the prefabricated retaining wall concrete module is provided with a reserved hole. A pad is installed in the reserved hole. The vertical steel bars of the retaining wall reserved in the bottom plate pass through the pad and are fixed to the pad by nuts. A cement mortar layer is cast in the reserved hole.

5. According to claim 4, the prefabricated hollow square column inspection pit with column foot bolting can be constructed in a positive direction, characterized in that: The bottom of the prefabricated retaining wall concrete module is provided with a rough surface.

6. According to claim 4, the prefabricated hollow square column inspection pit with column foot bolting can be constructed in a positive direction, characterized in that: A waterproof mortar layer is laid on the bottom of the prefabricated retaining wall concrete module.

7. According to claim 4, the prefabricated hollow square column column inspection pit can be constructed by bolting the column base in a positive direction, characterized in that: Both ends of the prefabricated retaining wall concrete module are provided with chamfers.

8. According to claim 1, the prefabricated hollow square column inspection pit with column foot bolted to the front construction is characterized by: The anchor bolt consists of an anchor bolt, a steel anchor plate, a leveling nut and a double nut. The steel anchor plate is installed at the bottom of the anchor bolt. The anchor bolts are connected by a limit plate. A leveling nut spirally connected to the anchor bolt is installed below the limit plate. The anchor bolt passes through the anchor bolt hole reserved in the column bottom steel plate at the bottom of the prefabricated small column concrete module and is fixed by the double nut.

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