Used for underground pile block pipe gallery in municipal pipe network project

Abstract

An underground pile block pipe gallery for municipal pipe network engineering, which relates to a prefabricated block assembled pipe gallery. The present invention solves the problems of high cost and slow construction progress of installing templates and pouring reinforced concrete at the existing pipe gallery construction site. The retaining piles are arranged in sequence along the length direction of the block pipe, and a layer of waterproof mortar surface is sprayed along the soil between two adjacent retaining piles. The pile top shielding plate assembly is arranged at the top of the retaining piles along the length direction of the block wall. When the soil is excavated to the elevation below the support top, it is located on the upper part of the retaining piles, and the supporting member top piles need to be installed. The bottom surface of the block pipe gallery is a cushion bottom plate, and the block wall is built on the top surface of the cushion bottom plate along the length direction of the retaining piles. The prefabricated top plate is overlapped on the upper end surface of the block wall. The retaining piles, block walls, cushion bottom plates and prefabricated top plates constitute a pile block pipe gallery. The present invention is an underground passage pipe gallery for the installation and maintenance of cables, water supply and heating pipe networks in municipal engineering.

Description

Technical Field

[0001] The invention relates to a pile block pipe gallery, in particular to an underground pile block pipe gallery channel used in a municipal pipe network project, and belongs to the field of underground geotechnical building structures. Background Art

[0002] The municipal underground pipe network needs to set up a centralized pipe space, which is called a pipe gallery. The pipe gallery is usually buried 6 to 8 meters underground, extending thousands of meters vertically, and the thickness of the soil layer on the pipe gallery is 2 to 4 meters. The bearing conditions of the pipe gallery are: the vertical load is equivalent to the permanent live load of 5 to 7 floors; the lateral load is the soil pressure at a depth of 6 to 8 meters.

[0003] According to the construction specifications, retaining structures must be set up during construction and abandoned after construction is completed. Currently, most of the pipe gallery design and construction is to install the formwork on site and pour reinforced concrete. This construction method is expensive and the construction progress is slow. If the pile bearing capacity can be fully utilized, the prefabrication and installation of bulk components can be realized.

[0004] In summary, the existing pipeline corridor construction is to install formwork on site and pour reinforced concrete, which has high construction cost and slow progress. Summary of the invention

[0005] The present invention aims to solve the problem that the existing pipe gallery construction is to install templates on site and pour reinforced concrete, and this construction method has high cost and slow construction progress, and further provides an underground pile block pipe gallery for municipal pipe network projects.

[0006] The technical solution adopted by the present invention to solve the above technical problems is:

[0007] The underground pile block pipe gallery for municipal pipe network engineering of the present invention comprises a pile top shielding plate assembly 2, a soil retaining pile 3, a supporting top member 4, a block wall 5, a cushion bottom plate 6 and a prefabricated top plate 7; the soil retaining piles 3 are arranged in sequence along the length direction of the block pipe gallery, and a layer of anti-seepage mortar surface layer is sprayed along the soil between two adjacent soil retaining piles 3, and the pile top shielding plate assembly 2 is arranged at the top of the soil retaining pile 3 along the length direction of the block wall 5. When the soil is excavated to the elevation below the supporting top, that is, located at the upper part of the soil retaining pile , it is necessary to install supporting components to support the top piles. The upper part of the retaining piles 3 is supported by the supporting components 4. The bottom surface of the block corridor is the cushion bottom plate 6. The block wall 5 is built on the top surface of the cushion bottom plate 6 along the length direction of the retaining piles 3. A pile-wall gap 1 is provided between the block wall 5 and the retaining piles 3. A mortar surface layer 9 is sprayed on the inner side of the block wall 5. The prefabricated top plate 7 is overlapped on the upper end surface of the block wall 5. The retaining piles 3, the block wall 5, the cushion bottom plate 6 and the prefabricated top plate 7 constitute a pile block corridor.

[0008] In one embodiment, steel bars are arranged at vertical intervals inside the block wall 5 , and the steel bars are distributed in the mortar surface layer 9 . The mortar surface layer 9 is a coarse gravel cement mortar surface layer, and the mortar surface layer 9 is also a protective layer for the steel bars.

[0009] In one embodiment, the gap between the pile wall gap 1 is 30 to 60 mm.

[0010] In one embodiment, the cushion base plate 6 is a cast-in-place reinforced concrete base plate with a concrete strength grade of C15 to C20. The thickness of the cushion base plate 6 is only partially thickened at the root of the block wall, and the side end surface of the cushion base plate 6 is embedded in the pile body of the retaining pile 3 by 30 to 60 mm.

[0011] In one embodiment, the side end surface of the prefabricated top plate 7 is embedded in the pile body of the retaining pile 3 by 10 to 30 mm.

[0012] In one embodiment, the prefabricated top plate 7 is a prefabricated sloped plate or a prefabricated hollow plate. When the upper end surface of the prefabricated top plate 7 is a gentle slope, the thickness of the prefabricated sloped plate end is not less than half of the mid-span plate thickness; when used for a plane interlayer plate, the top plate 5 is a prefabricated hollow plate.

[0013] In one embodiment, the soil retaining piles 3 are reinforced concrete piles, which are prefabricated reinforced concrete piles pressed into the soil or bored cast-in-place piles, and the diameter of the soil retaining piles 3 is 300-500 mm.

[0014] In one embodiment, the top supporting member 4 includes a support rod, two end supports and two wedge-shaped plugs, the end supports are fixed to the upper ends of the retaining piles 3, the support rod is overlapped on the two end supports, and the wedge-shaped plugs are installed between the support rod and the supports.

[0015] In one embodiment, the pile top shield assembly 2 includes a shield, a baffle and a connecting wood. The shield and the baffle are vertically arranged and fixedly connected by the connecting wood. The connecting wood is located at the inner corner of the shield and the baffle.

[0016] In one embodiment, the shield is horizontally overlapped on the top surface of the upper end of the retaining pile 3, the vertical baffle is used to block the side wall soil at the top of the retaining pile 3, the two ends of the connecting wood are placed between two adjacent retaining piles 3, and the cross-section of the connecting wood is square or rectangular. In one embodiment, the outer wall of the block wall 5 is provided with vertical steel bars at intervals, and the steel bars are distributed in the mortar surface layer 9, and the mortar surface layer 9 is a coarse gravel cement mortar surface layer.

[0017] The beneficial effects of the present invention are:

[0018] The present invention is used for the construction of the outer walls on both sides of the underground pile block pipe gallery of the municipal pipe network project, without the need to excavate and backfill the earth in the working space, and the excavation width on both sides of the outer wall is saved to reach 1.8 meters, retaining the original ground soil and vegetation;

[0019] The present invention is used for the construction of the outer wall of the underground pile block pipe gallery of the municipal pipe network project without installing a template. A gap is reserved between the block wall and the retaining pile. After the deformation of the pile body is completed, it can be determined whether to use a waterproof material to fill the gap according to the strength of the surface water infiltration in various sections.

[0020] The present invention is used for the underground pile block pipe gallery of the municipal pipe network project. The cushion bottom plate is embedded in the pile body to form an integrated vertical load-bearing structure, which has the effect of overhanging the cushion bottom plate, expanding the base area, and reducing the thickness of the cushion bottom plate.

[0021] The present invention is used in the underground pile block corridor of the municipal pipe network project. The lateral soil pressure is borne by the piles. Only vertical spacing distribution steel bars need to be arranged inside the block wall. There is no need to install the formwork on site to pour reinforced concrete, thus reducing the construction cost and shortening the construction period.

[0022] The prefabricated top plate of the underground pile block pipe gallery used in the municipal pipe network project of the present invention is a prefabricated sloped plate or a hollow plate, and the overall pipe gallery components are fully prefabricated, without the need for a template, thereby speeding up the construction progress;

[0023] The present invention is used for supporting a plastic film warm-keeping greenhouse on the pile top shielding plate assembly of an underground pile block pipe gallery in a municipal pipe network project, thereby realizing the scattered assembly during winter construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a cross-sectional view of the underground pile block pipe gallery used in municipal pipe network engineering of the present invention;

[0025] Figure 2 It is an enlarged structural view of the top supporting member 4 in the eighth specific implementation mode of the present invention. DETAILED DESCRIPTION

[0026] Specific implementation method 1: Figure 1 and Figure 2As shown, the underground pile block pipe gallery for municipal pipe network engineering of this embodiment comprises a pile top shielding plate assembly 2, retaining piles 3, supporting top components 4, block walls 5, cushion bottom plate 6 and prefabricated top plate 7; the retaining piles 3 are arranged in sequence along the length direction of the block pipe gallery, a layer of waterproof mortar is sprayed along the soil between two adjacent retaining piles 3, the pile top shielding plate assembly 2 is arranged on the top of the retaining piles 3 along the length direction of the block wall 5, and when the soil is excavated to the elevation below the supporting top, the top of the pile top shielding plate assembly 2 is provided. That is, when it is located on the upper part of the retaining piles, it is necessary to install a supporting member to support the top of the piles, that is, the upper part of the retaining piles 3 is supported by the supporting member 4, the bottom surface of the block corridor is the cushion bottom plate 6, and the block wall 5 is built on the top surface of the cushion bottom plate 6 along the length direction of the retaining piles 3. A pile-wall gap 1 is provided between the block wall 5 and the retaining piles 3. A mortar surface layer 9 is sprayed on the outer side of the block wall 5. The prefabricated top plate 7 is overlapped on the upper end surface of the block wall 5. The retaining piles 3, the block wall 5, the cushion bottom plate 6 and the prefabricated top plate 7 constitute a pile block corridor.

[0027] The structure of the municipal pipe gallery is not in the condition of groundwater intrusion; the block wall 5 is built with load-bearing blocks. In order to have a certain lateral bearing capacity, the block wall 5 is arranged with vertically spaced steel bars in the mortar plaster layer. The block wall surface is close to the pile row, and the deformation joint of the pile row is reserved. The ends of the top plate and the bottom plate are respectively embedded in the pile body to form a whole, forming the pipe gallery channel structure. During the construction period, the pile body steel beam needs to be supported by temporary support against the pile row, which can be made of steel pipes or large-section wooden blocks. Wedge blocks are reserved at the ends of the components to wedge into the extrusion force to squeeze the beam pile row, thereby increasing the pile spacing. At the same time, the cross-section design of the top support component is calculated by the load-bearing formula and must meet the stress strength requirements.

[0028] Wedge-shaped blocks are left at both ends of the top support member, which are wedged into the piles to generate pre-pressure and transmit it to the soil behind the piles, which can increase the spacing between the piles. The cross-sectional bearing capacity of the top support member can be calculated as follows:

[0029] N q -N te ≤N fy -N pe

[0030] Where: N q is the earth pressure load acting on the pile body at the top point of the support;

[0031] N te The wedge-shaped block at the top of the support squeezes the beam piles to transfer the force into the soil;

[0032] N pe It is the effective pressure of the wedge block squeezing the pile beam; Note: N pe ≥N te

[0033] N fyIt is the design value of the axial compressive bearing capacity of the supporting member.

[0034] Specific implementation method 2: Figure 1 As shown, in this embodiment, the side wall of the block wall 5 is provided with vertical steel bars at intervals, and the steel bars are distributed in the mortar surface layer 9. The mortar surface layer 9 is a coarse gravel cement mortar surface layer, and the mortar surface layer 9 is also a protective layer for the steel bars.

[0035] This design eliminates the need to install formwork on site to pour reinforced concrete, making construction easier and reducing construction costs.

[0036] Other components and connection relationships are the same as those in the first specific implementation mode.

[0037] Specific implementation method three: Figure 1 As shown, the gap of the pile-wall gap 1 in this embodiment is 30 to 60 mm.

[0038] With such a design, after the deformation of the pile body is completed, it can be determined whether to use waterproof material to pour the pile-wall gap 1 according to the strength of surface water infiltration in various sections.

[0039] The other components and connection relationships are the same as those in the first or second specific implementation mode.

[0040] Specific implementation method four: Figure 1 As shown, the base plate 4 of the cushion layer in this embodiment is a cast-in-place reinforced concrete base plate with a concrete strength grade of C15 to C20. The thickness of the cushion layer base plate 4 is only partially thickened at the root of the block wall, and the side end surface of the cushion layer base plate 6 is embedded in the body of the retaining pile 3 by 30 to 60 mm.

[0041] Such a design can form a convenient equipment pipeline channel, with a concrete strength grade of C15-C20, which is not required to be high, reducing the application cost of concrete; it is also convenient to chisel and embed the embedded parts. The cushion bottom plate is embedded in the pile body to form an integrated vertical bearing, which is equivalent to the cushion bottom plate cantilevering, expanding the bottom area of ​​the base, reducing the thickness of the cushion bottom plate, and the bottom plate is only partially thickened at the root of the block wall.

[0042] Other components and connection relationships are the same as those of the third specific implementation method.

[0043] Specific implementation method 2: Figure 1 As shown, in this embodiment, the side wall of the block wall 5 is provided with vertically spaced steel bars, and the steel bars are distributed in the mortar surface layer 9, and the mortar surface layer 9 is a coarse gravel cement mortar surface layer.

[0044] This design eliminates the need to install formwork on site to pour reinforced concrete, making construction easier and reducing construction costs.

[0045] Other components and connection relationships are the same as those in the first specific implementation mode.

[0046] Specific implementation method three: Figure 1 As shown, the gap of the pile-wall gap 1 in this embodiment is 30 to 60 mm.

[0047] With such a design, after the deformation of the pile body is completed, it can be determined whether to use waterproof material to pour the pile-wall gap 1 according to the strength of surface water infiltration in various sections.

[0048] The other components and connection relationships are the same as those in the first or second specific implementation mode.

[0049] Specific implementation method four: Figure 1 As shown, the bottom plate 4 of the cushion layer in this embodiment is a cast-in-place reinforced concrete bottom plate with a concrete strength grade of C15-C20, and the side end surface of the cushion layer bottom plate 6 is embedded in the pile body of the retaining pile 3 by 30-60 mm.

[0050] Such a design can form a convenient equipment pipeline channel, with a concrete strength grade of C15-C20, which is not required to be high, reducing the application cost of concrete; it is also convenient to chisel and embed the embedded parts. The cushion bottom plate is embedded in the pile body to form an integrated vertical bearing, which is equivalent to the cushion bottom plate cantilevering, expanding the bottom area of ​​the base, reducing the thickness of the cushion bottom plate, and the bottom plate is only partially thickened at the root of the block wall.

[0051] Other components and connection relationships are the same as those of the third specific implementation method.

[0052] Specific implementation method five: Figure 1 As shown, the side end surface of the prefabricated top plate 7 of this embodiment is embedded in the pile body of the retaining pile 3 by 10 to 30 mm.

[0053] This design is to make full use of the pile rows and block walls to bear part of the vertical load.

[0054] Other components and connection relationships are the same as those of the first, second or fourth specific implementation modes.

[0055] Specific implementation method six: Figure 1 As shown, the prefabricated top plate 7 in this embodiment is a prefabricated sloped plate, the upper end surface of the prefabricated top plate 7 is a gentle slope, and the thickness of the end of the prefabricated sloped plate is not less than half of the thickness of the plate in the middle of the span.

[0056] Such a design facilitates the reservation of pipeline equipment entrances, and the prefabricated top plate is movable, which is convenient for digging and moving earth, and is suitable for winter construction; when used for a plane interlayer plate, the prefabricated top plate 7 is a prefabricated hollow plate.

[0057] Other components and connection relationships are the same as those of the fifth specific implementation method.

[0058] Specific implementation method seven: Figure 1As shown, the soil retaining piles 3 in this embodiment are reinforced concrete piles. The soil retaining piles 3 are prefabricated reinforced concrete piles pressed into the soil or bored cast-in-place piles. The diameter of a single pile of the soil retaining piles 3 is 300-500 mm.

[0059] The present invention is used for underground pile block pipe gallery of municipal pipe network engineering, adopts retaining piles to replace the side wall of the pipe gallery to bear horizontal soil pressure, and then cooperates with a part of vertical bearing, saves the installation template, facilitates construction, and reduces the cost of municipal pipe network engineering.

[0060] The other components and connection relationships are the same as those of the specific implementation modes 1, 2, 4 or 6.

[0061] Specific implementation method eight: Figure 1 and Figure 2 As shown, the supporting top member 4 of this embodiment includes a support rod, two end supports and two wedge-shaped plugs. The end supports are fixedly mounted on the upper ends of the retaining piles 3, the support rod is overlapped on the two end supports, and the wedge-shaped plugs are installed between the support rod and the supports.

[0062] With this design, wedge-shaped blocks are installed at both ends of the supporting top member, which are wedged into the piles to generate pre-pressure and transmit it to the soil behind the piles, thereby increasing the spacing between the piles. After the installation of the corridor top plate is completed, the supporting top blocks can be removed to facilitate the installation of the facilities on the upper floor of the corridor.

[0063] The other components and connection relationships are the same as those of the seventh specific implementation method.

[0064] Specific implementation method nine: Figure 1 As shown, the pile top shielding plate assembly 2 of this embodiment includes a shielding plate, a baffle and a connecting wood. The shielding plate and the baffle are vertically arranged and fixedly connected by the connecting wood. The connecting wood is located at the inner corner side of the shielding plate and the baffle.

[0065] With such a design, the pile top shielding plate assembly can be used as the end support of the insulation shed during winter construction, supporting the plastic film insulation shed and realizing the scattered assembly during winter construction.

[0066] The other components and connection relationships are the same as those of the first, second, fourth, sixth or eighth specific implementation modes.

[0067] Specific implementation method ten: Figure 1 As shown, in this embodiment, the shield plate is horizontally overlapped on the top surface of the upper end of the retaining piles 3, the upright baffle blocks the lateral soil pressure on the top of the piles 3, the two ends of the connecting wood are pressed between two adjacent retaining piles 3, and the cross-section of the connecting wood is square or rectangular.

[0068] With such a design, the two ends of the connecting wood are pressed between two adjacent retaining piles 3 to limit the plane sliding of the shielding plate between the inverted L-shaped piles, and the shielding plates are firmly connected to each other through the connecting wood.

[0069] Other components and connection relationships are the same as those of the ninth embodiment.

[0070] Pipeline corridor construction work:

[0071] As the earth is excavated downward, the pile bodies are exposed. Pay attention to filling the soil between the piles where it has collapsed due to the excavation of the machine, and level and compact the loose soil between the piles. Then spray and scrape M 10 Waterproof mortar surface layer, spray anti-seepage membrane. The anti-seepage mortar surface layer of the retaining pile 3 is integrated with the bottom plate. Build the pipe gallery wall, install the prefabricated top plate 7, arrange the vertical steel bars on the wall, and spray the mortar protective layer.

Claims

1. An underground pile block pipe gallery for a municipal pipe network project, the underground pile block pipe gallery for a municipal pipe network project comprising a pile top shielding plate assembly (2), retaining piles (3), a top supporting member (4), a block wall (5), a cushion bottom plate (6) and a prefabricated top plate (7); characterized in that: The retaining piles (3) are arranged in sequence along the length direction of the block pipe gallery. A layer of water-proof mortar surface is sprayed along the soil between two adjacent retaining piles (3). The pile top shielding plate assembly (2) is arranged at the top of the retaining piles (3) along the length direction of the block wall (5). When the soil is excavated to the elevation below the support top, that is, at the upper part of the retaining piles, a supporting member is installed to support the top of the retaining piles. The upper part of the retaining piles (3) is supported by the support member (4). The block pipe gallery is The bottom surface of the corridor is a cushion bottom plate (6), the block wall (5) is built on the top surface of the cushion bottom plate (6) along the length direction of the retaining piles (3), a pile-wall gap (1) is provided between the block wall (5) and the retaining piles (3), a mortar surface layer (9) is sprayed on the inner side of the block wall (5), a prefabricated top plate (7) is overlapped on the upper end surface of the block wall (5), and the retaining piles (3), the block wall (5), the cushion bottom plate (6) and the prefabricated top plate (7) constitute a pile block pipe corridor; The cushion bottom plate (6) is a cast-in-place reinforced concrete bottom plate, the concrete strength grade is C15-C20, the thickness of the cushion bottom plate (6) is only partially thickened at the root of the block wall, and the side end surface of the cushion bottom plate (6) is embedded in the pile body of the retaining pile (3) by 30-60 mm; The side end surface of the prefabricated top plate (7) is embedded in the pile body of the retaining pile (3) by 10 to 30 mm; The pile top shielding plate assembly (2) comprises a shielding plate, a baffle and a connecting wood, wherein the shielding plate and the baffle are arranged vertically and are fixedly connected by the connecting wood, and the connecting wood is located at the inner corner of the shielding plate and the baffle; The shield plate is horizontally overlapped on the top surface of the upper end of the retaining pile (3), the upright shield plate is used to block the side wall soil at the top of the retaining pile (3), the two ends of the connecting wood square are placed between two adjacent retaining piles (3), and the cross section of the connecting wood square is square or rectangular.

2. The underground pile block pipe gallery for municipal pipe network engineering according to claim 1 is characterized in that: Steel bars are arranged at vertical intervals inside the block wall (5), and the steel bars are distributed in the mortar surface layer (9). The mortar surface layer (9) is a coarse gravel cement mortar surface layer, and the mortar surface layer (9) is also a protective layer for the steel bars.

3. The underground pile block pipe gallery for municipal pipe network engineering according to claim 1 or 2, characterized in that: The gap between the pile and wall (1) is 30 to 60 mm.

4. The underground pile block pipe gallery for municipal pipe network engineering according to claim 3 is characterized in that: The prefabricated top plate (7) is a prefabricated sloping plate or a prefabricated hollow plate. When the upper end surface of the prefabricated top plate (7) is a gentle slope, the thickness of the prefabricated sloping plate end is not less than half the thickness of the plate at the mid-span. When used as a plane interlayer plate, the top plate (7) is a prefabricated hollow plate.

5. The underground pile block pipe gallery for municipal pipe network engineering according to claim 1, 2 or 4, characterized in that: The retaining piles (3) are reinforced concrete piles. The retaining piles (3) are prefabricated reinforced concrete piles pressed into the soil or bored cast-in-place piles. The diameter of the retaining piles (3) is 300-500 mm.

6. The underground pile block pipe gallery for municipal pipe network engineering according to claim 5 is characterized in that: The top supporting member (4) comprises a supporting rod, two end supports and two wedge-shaped plugs, the end supports are fixedly mounted on the upper ends of the retaining piles (3), the supporting rod is overlapped on the two end supports, and the wedge-shaped plugs are installed between the supporting rod and the supports.

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