A fully prefabricated assembled composite pipe gallery support construction structure and technology

Abstract

The present invention belongs to the technical field of comprehensive pipe gallery construction, and specifically relates to a fully prefabricated assembled superimposed comprehensive pipe gallery support construction structure and process, including a prefabricated comprehensive pipe gallery, and also including prefabricated support piles, prefabricated external anchor piles and prefabricated crown beams, adjacent prefabricated support piles are connected together by sockets, prefabricated support piles and prefabricated external anchor piles are connected together with prefabricated crown beams by sockets, and the prefabricated comprehensive pipe gallery and the prefabricated support piles are connected by wet method. The present invention adopts prefabricated assembled structural parts for construction from the foundation pit support of the comprehensive pipe gallery construction to the main structure in the later stage, and fully adopts the superposition of the support structure and the main structure, reduces the thickness of the main structure, reduces the steel and concrete usage of the structural parts, saves costs, reduces the construction area, and shortens the construction period.

Description

Technical Field

[0001] The present invention belongs to the technical field of integrated pipe gallery construction, and in particular relates to a fully prefabricated assembled and superimposed integrated pipe gallery support construction structure and process. Background Art

[0002] With the comprehensive development of cities, many supporting infrastructures have been transferred from above ground to underground development, and underground pipelines have become increasingly complex, so the demand for building comprehensive pipeline corridors has increased. How to quickly build comprehensive pipeline corridors in the core areas of cities and minimize the impact of construction is the key to reducing the construction area and shortening the construction period, so as to minimize the impact on the surrounding environment. This is also a problem that needs to be solved urgently.

[0003] In order to speed up the progress, more and more prefabricated assembly construction is currently adopted for comprehensive pipe corridors. Compared with traditional cast-in-place construction, prefabricated concrete assembly of comprehensive pipe corridors can greatly shorten the construction period and ensure better quality, and has become the main construction method for underground comprehensive pipe corridors. However, in actual construction, not only the construction of the main structure of the comprehensive pipe corridor takes a long time, but the construction of the supporting structure also takes a lot of time. How to further shorten the construction period and reduce the construction area based on the existing construction technology is a goal that people have been thinking about and pursuing. Summary of the invention

[0004] In order to solve the deficiencies of the prior art, the present invention provides a fully prefabricated assembled and laminated comprehensive pipe gallery support construction structure and process.

[0005] The present invention is achieved through the following technical solutions:

[0006] A fully prefabricated assembled and superimposed integrated pipe gallery support construction structure comprises a prefabricated integrated pipe gallery, on which connection steel bars are reserved, and the prefabricated supporting piles, prefabricated external anchor piles and prefabricated crown beams are also included. Connection steel bars are reserved on the prefabricated supporting piles, and adjacent prefabricated supporting piles are connected together by sockets. A socket plug A is provided on the top of the prefabricated supporting piles; a socket plug B is provided on the top of the prefabricated external anchor piles; a supporting pile reserved hole matching the socket plug A and an external anchor pile reserved hole matching the socket plug B are provided at the bottom of the prefabricated crown beam, the socket plug A is inserted into the supporting pile reserved hole to be connected to the prefabricated crown beam, and the socket plug B is inserted into the external anchor pile reserved hole to be connected to the prefabricated crown beam; the connection steel bars between the prefabricated integrated pipe gallery and the prefabricated supporting piles are connected together by hook steel bars, and the prefabricated integrated pipe gallery and the prefabricated supporting piles are poured together by concrete.

[0007] Preferably, the specific structure of the socket connection between adjacent prefabricated supporting piles is: a recess is provided on one side of the prefabricated supporting pile, and a protrusion is provided on the opposite side, and the recess and protrusion of adjacent prefabricated supporting piles are socketed together.

[0008] Preferably, the cross-sectional area of ​​the socket A is smaller than the cross-sectional area of ​​the prefabricated supporting pile.

[0009] Preferably, the diameter of the socket B is smaller than the pile diameter of the prefabricated external anchor pile.

[0010] Preferably, 5 rows of connecting steel bars are reserved at the upper and lower parts of the prefabricated supporting piles, with each row of connecting steel bars spaced 10 cm apart; the lower connecting steel bars are arranged within 50 cm upward from the lowest point of the buried depth of the prefabricated integrated pipe gallery.

[0011] Preferably, the prefabricated supporting piles are square piles with a side length of 50 cm; the prefabricated external anchor piles are 20-30 m long and 15-30 cm in diameter; the prefabricated cap beams are 2 m long, 1 m wide and 0.5 m high.

[0012] Preferably, four reserved holes for support piles and two reserved holes for external anchor piles are provided at the bottom of the prefabricated cap beam.

[0013] Preferably, the prefabricated integrated pipe gallery is divided into two prefabricated structures, upper and lower.

[0014] The present invention also includes a fully prefabricated assembled composite pipe gallery support and construction process, comprising the following steps:

[0015] (1) Processing prefabricated support piles, prefabricated crown beams, and prefabricated external anchor piles;

[0016] (2) Cleaning the ground surface and laying out the edges of foundation pit support piles;

[0017] (III) Driving of support structure: Driving prefabricated support piles, connecting prefabricated support piles by spigot and socket, driving prefabricated external anchor piles simultaneously, and connecting prefabricated cap beams with prefabricated support piles and prefabricated external anchor piles;

[0018] (iv) Installation of prefabricated integrated pipe corridor. After the installation of the prefabricated integrated pipe corridor, the prefabricated integrated pipe corridor and the prefabricated supporting piles are connected by wet method; structural backfilling. Before backfilling, the gaps between the prefabricated integrated pipe corridor and the prefabricated supporting piles are filled with waterproof mortar.

[0019] Preferably, in the step (iii), after the support structure is built for 200m to form a comprehensive support unit, according to the groundwater conditions, if drainage and dewatering are required in the foundation pit, a drainage well is built in the foundation pit and dewatering is carried out.

[0020] The present invention adopts full-process prefabrication and assembly construction in the process of building a comprehensive pipeline corridor. Prefabricated assembly structural parts are used for construction of the foundation pit support of the comprehensive pipeline corridor and the main structure in the later stage. The support structure and the main structure are fully overlapped to reduce the thickness of the main structure, reduce the steel and concrete consumption of the structural parts, save costs, reduce construction area, and shorten the construction period.

[0021] The present invention adopts prefabricated support piles, prefabricated crown beams and prefabricated external anchor piles when constructing the support structure, and forms a support system through effective connection of the three, which is formed in one step and replaces the conventional bored cast-in-place pile support construction.

[0022] All components of the present invention are factory-made and can be mass-produced, so that the quality and progress are guaranteed. The present invention has simple steps, strong operability, saves construction space, and has significant economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of this embodiment.

[0024] Figure 2 Schematic diagram of the structure of the support structure of this embodiment.

[0025] Figure 3 It is a schematic diagram of the structure of the prefabricated supporting piles of this embodiment.

[0026] Figure 4 This is a schematic diagram of the prefabricated external anchor pile structure of this embodiment.

[0027] Figure 5 FIG. 4 is a schematic diagram of a partial connection structure of this embodiment.

[0028] Figure 6 It is a schematic diagram of the cross-sectional structure of the prefabricated supporting piles of this embodiment.

[0029] Figure 7 Schematic diagram of the bottom structure of the crown beam of this embodiment.

[0030] In the figure, 1 is a prefabricated integrated pipe corridor, 2 is a connecting steel bar, 3 is a prefabricated supporting pile, 4 is a prefabricated external anchor pile, 5 is a prefabricated crown beam, 6 is a socket A, 7 is a socket B, 8 is a reserved hole for supporting piles, 9 is a reserved hole for external anchor piles, 10 is a hook steel bar, 11 is a recess, and 12 is a protrusion. DETAILED DESCRIPTION

[0031] Specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of this application fall within the protection scope of the present invention.

[0032] The support structure of this embodiment includes prefabricated support piles 3, prefabricated external anchor piles 4 and prefabricated crown beams 5. Adjacent prefabricated support piles 3 are connected together by sockets. The prefabricated crown beams 5 are located above the prefabricated support piles 3 and the prefabricated external anchor piles 4. The prefabricated support piles 3 and the prefabricated external anchor piles 4 are both connected with the prefabricated crown beams 5 by sockets. The support structure is connected with the prefabricated integrated pipe gallery 1 by wet method. The prefabricated integrated pipe gallery 1 is an existing prefabricated integrated pipe gallery. The prefabricated integrated pipe gallery 1 is provided with connecting steel bars 2 for wet method connection.

[0033] The socket structure of the above-mentioned prefabricated support pile 3 is a protrusion 12 and a recess 11 respectively arranged on two opposite sides of the prefabricated support pile 3. The protrusion 12 is a convex structure protruding from the prefabricated support pile 3, and the recess 11 is a groove structure matching the protrusion. Adjacent prefabricated support piles 3 are connected together by sockets through the protrusion 12 and the recess 11. A connecting steel bar 2 is reserved on the prefabricated support pile 3. The connecting steel bar 2 here is used for wet connection with the connecting steel bar 2 on the prefabricated integrated pipe gallery 1. A socket head A6 is provided on the top of the prefabricated support pile 3, and the socket head A6 is used to be socketed with the prefabricated crown beam 5.

[0034] A socket B7 is provided on the top of the prefabricated external anchor pile 4 , and the diameter of the socket B7 is smaller than the pile diameter of the prefabricated external anchor pile 4 .

[0035] The bottom of the above-mentioned prefabricated crown beam 5 is provided with a support pile reserved hole 8 matching the socket plug A6 and an external anchor pile reserved hole 9 matching the socket plug B7, wherein the prefabricated support pile 3 is inserted into the support pile reserved hole 8 through the socket plug A6 and is socketed together with the prefabricated crown beam 5, and the prefabricated external anchor pile 4 is inserted into the external anchor pile reserved hole 9 through the socket plug B7 and is socketed together with the prefabricated crown beam 5.

[0036] The connecting steel bars 2 between the above-mentioned prefabricated integrated pipe gallery 1 and the prefabricated supporting piles 3 are connected together by S-shaped hook steel bars 10, and the prefabricated integrated pipe gallery 1 and the prefabricated supporting piles 3 are poured together by concrete.

[0037] This embodiment also includes a fully prefabricated assembled composite pipe gallery support and construction process, including the following steps:

[0038] Step 1: Prefabricate and process prefabricated supporting piles 3, prefabricated cap beams 5, and prefabricated external anchor piles 4.

[0039] The interlocking prefabricated support pile 3 is processed in the prefabrication plant. The prefabricated support pile 3 is a square pile with a side length of 50 cm. It is interlocked with a concave and convex socket to form an interlocking support pile. The concave and convex sockets are 5 cm apart, that is, the vertical length of the socket recess 11 and the convex socket 12 is 5 cm. In this embodiment, the recess 11 and the convex socket 12 are both arranged on the side 50 cm downward from the top of the prefabricated support pile 3. A recess 11 is provided on one side of the prefabricated support pile 3, and a convex socket 12 is provided on the opposite side. The recesses 11 and the convex sockets 12 of adjacent prefabricated support piles 3 are socketed together to achieve the connection of the prefabricated support piles 3. A socket plug A6 is also integrally provided on the top of the prefabricated support pile 3. The socket plug A6 is used to connect the prefabricated crown beam 5. The cross-sectional area of ​​the socket plug A6 is smaller than the cross-sectional area of ​​the prefabricated support pile 3.

[0040] Connecting steel bars 2 for wet connection with the main structure of the integrated pipeline corridor are reserved on the upper part of the prefabricated supporting piles 3. The diameter of the connecting steel bars 2 is above 22 mm. Five rows of connecting steel bars 2 are reserved from top to bottom on the upper part of the prefabricated supporting piles 3, with an interval of 10 cm between each row of connecting steel bars 2; connecting steel bars 2 for wet connection with the main structural parts of the integrated pipeline corridor are also reserved on the lower part of the prefabricated supporting piles 3. The lower connecting steel bars 2 are located within 50 cm upward from the lowest point of the buried depth of the main structure of the integrated pipeline corridor. The diameter of the connecting steel bars 2 is also above 22 mm. Five rows of connecting steel bars 2 are also reserved from top to bottom on the lower part of the prefabricated supporting piles 3, with an interval of 10 cm between each row of connecting steel bars 2.

[0041] The prefabricated external anchor pile 4 is processed in the prefabrication plant, and the length of the prefabricated external anchor pile 4 is 20-30m, and the pile diameter is 15-30cm. A socket B7 is integrally provided on the top of the prefabricated external anchor pile 4, and the socket B7 is used to connect the prefabricated crown beam 5, and the diameter of the socket B7 is smaller than the pile diameter of the prefabricated external anchor pile 4.

[0042] The prefabricated crown beam 5 is processed in the prefabrication plant. The prefabricated crown beam 5 is 2m long, 2m per section, 1m wide and 0.5m high. Four support pile reserved holes 8 and two external anchor pile reserved holes 9 are provided at the bottom of each section of the prefabricated crown beam 5. The four support pile reserved holes 8 match the socket plugs A6, and are respectively connected downward to the socket plugs A6 of the prefabricated support piles 3. The prefabricated support piles 3 are connected to the prefabricated crown beam 5 through the socket plugs A6 and the support pile reserved holes 8. In this embodiment, the support pile reserved holes 8 are square holes, so the socket plug A6 is also a square head. Of course, other matching socket shapes and structures can also be selected, and the present invention does not make special restrictions on this. The length of the support pile reserved holes 8 here is less than 50cm. The two external anchor pile reserved holes 9 are respectively connected downward to the prefabricated external anchor pile 4. The hole diameter of the external anchor pile reserved hole 9 is smaller than the pile diameter of the prefabricated external anchor pile 4. The external anchor pile reserved hole 9 matches the socket plug B7. The prefabricated external anchor pile 4 is connected to the prefabricated crown beam 5 through the external anchor pile reserved hole 9 and the socket plug B7.

[0043] The main structure - prefabricated integrated pipe corridor 1 is processed in the prefabrication plant. The prefabricated integrated pipe corridor 1 is an existing mature process and will not be described in detail here. At present, there are two main ways to prefabricate the integrated pipe corridor 1: prefabrication of the integrated pipe corridor structure as a whole ring and prefabrication of the integrated pipe corridor structure in upper and lower parts. The two methods can be flexibly determined according to site conditions. This embodiment takes the prefabricated assembly of the upper and lower parts of the prefabricated integrated pipe corridor 1 as an example. The prefabricated integrated pipe corridor 1 has connecting steel bars 2 that are wet-connected to the prefabricated support piles 3 on the upper and lower side walls, respectively, which correspond to the connecting steel bars 2 of the prefabricated support piles 3.

[0044] Step 2: Clean the surface and lay out the edges of the foundation pit support piles.

[0045] Step 3: Support structure installation: drive prefabricated support piles 3, prefabricated external anchor piles 4, and install prefabricated cap beams 5.

[0046] The prefabricated support piles 3 are transported from the prefabrication yard to the construction site for installation. During installation, attention should be paid to the engagement of the sockets of the concave 11 and the convex 12, and the prefabricated external anchor piles 4 should be installed simultaneously. In this embodiment, after the four prefabricated support piles 3 are socketed together, the prefabricated crown beam 5 is installed in time, and the prefabricated crown beam 5 is connected to the prefabricated support piles 3 through the socket A6, and the prefabricated crown beam 5 is connected to the prefabricated external anchor piles 4 through the socket B7 to form a comprehensive support.

[0047] After the support structure is built for 200m to form a comprehensive support unit, consider whether to drain and dewater the foundation pit according to the groundwater conditions. If dewatering is required, a dewatering well is built in the foundation pit and dewatering is carried out. After dewatering is completed, earthwork excavation is carried out. After the foundation pit is formed for 50m, preparations for the installation of the prefabricated main structure are started.

[0048] Step 4: The prefabricated integrated pipe gallery 1 is installed and overlapped with the supporting structure.

[0049] When installing the prefabricated integrated pipe gallery 1, the lower part is installed first, and after installation, it is wet-connected with the prefabricated support piles 3 in a timely manner. The connection steel bars 2 reserved for the prefabricated integrated pipe gallery 1 and the connection steel bars 2 reserved for the prefabricated support piles 3 are connected together using S-shaped hook steel bars 10, and the diameter of the hook steel bars 10 is more than 22 mm. Then, high-strength fine stone concrete is poured to complete the overlapping connection between the lower part of the prefabricated integrated pipe gallery 1 and the support structure.

[0050] After the lower part of the prefabricated integrated pipeline corridor 1 is installed for 20m, the installation of the upper part of the prefabricated integrated pipeline corridor 1 will begin. After the upper part of the prefabricated integrated pipeline corridor 1 is installed, it is also promptly wet-connected with the prefabricated supporting piles 3, and high-strength fine stone concrete is poured to complete the overlapping connection between the upper part of the prefabricated integrated pipeline corridor 1 and the supporting structure.

[0051] The upper and lower parts of the prefabricated integrated pipe gallery 1 and the adjacent longitudinal blocks are provided with reserved tension holes, connected by steel strands or prestressed steel rods, and the contact surfaces are provided with reserved rubber water stop strips for water stop. The assembly of the existing upper and lower prefabricated integrated pipe gallery 1 will not be described in detail here.

[0052] After the prefabricated integrated pipe gallery 1 is installed and formed, the structure is finally backfilled. Before backfilling, high-strength waterproof mortar is used to fill the gaps between the prefabricated integrated pipe gallery 1 and the prefabricated supporting piles 3.

[0053] The embodiment described above is only one of the more preferred specific implementations of the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A fully prefabricated assembled composite pipe gallery support construction structure, comprising a prefabricated composite pipe gallery (1), wherein connecting steel bars (2) are reserved on the prefabricated composite pipe gallery (1), and characterized in that: It also includes a prefabricated support pile (3), a prefabricated external anchor pile (4) and a prefabricated crown beam (5); adjacent prefabricated support piles (3) are connected together by means of sockets and spigots, and a socket plug A (6) is provided at the top of the prefabricated support pile (3); a socket plug B (7) is provided at the top of the prefabricated external anchor pile (4); four support pile reserved holes (8) matching the socket plug A (6) and two external anchor pile reserved holes (9) matching the socket plug B (7) are provided at the bottom of the prefabricated crown beam (5); the socket plug A (6) is inserted into the support pile reserved holes (8) to be connected to the prefabricated crown beam (5); the socket plug B (7) is provided at the bottom of the prefabricated crown beam (5); ) is inserted into the reserved hole (9) of the external anchor pile and connected with the prefabricated crown beam (5); 5 rows of connecting steel bars (2) are reserved at the upper and lower parts of the prefabricated support pile (3), and the interval between each row of connecting steel bars (2) is 10 cm. The lower connecting steel bars (2) are arranged within 50 cm upward from the lowest point of the buried depth of the prefabricated integrated pipe gallery (1). The connecting steel bars (2) between the prefabricated integrated pipe gallery (1) and the prefabricated support pile (3) are connected together by hook steel bars (10), and the prefabricated integrated pipe gallery (1) and the prefabricated support pile (3) are poured together by concrete.

2. The fully prefabricated assembled composite pipe gallery support construction structure according to claim 1 is characterized in that: The specific structure of the socket connection between adjacent prefabricated support piles (3) is as follows: a notch (11) is provided on one side of the prefabricated support pile (3), and a protrusion (12) is provided on the opposite side, and the notch (11) and protrusion (12) of the adjacent prefabricated support piles (3) are socket-connected together.

3. The fully prefabricated assembled composite pipe gallery support construction structure according to claim 1 is characterized in that: The cross-sectional area of ​​the socket A (6) is smaller than the cross-sectional area of ​​the prefabricated support pile (3).

4. The fully prefabricated assembled composite pipe gallery support construction structure according to claim 1 is characterized in that: The diameter of the socket B (7) is smaller than the pile diameter of the prefabricated external anchor pile (4).

5. The fully prefabricated assembled composite pipe gallery support construction structure according to claim 1 is characterized in that: The prefabricated support pile (3) is a square pile with a side length of 50 cm; the prefabricated external anchor pile (4) is 20-30 m long and has a pile diameter of 15-30 cm; the prefabricated cap beam (5) is 2 m long, 1 m wide and 0.5 m high.

6. The fully prefabricated assembled composite pipe gallery support construction structure according to claim 1 is characterized by: The prefabricated integrated pipe gallery (1) is divided into two prefabricated structures, an upper part and a lower part.

7. Based on the fully prefabricated assembled and superimposed integrated pipe gallery support and construction structure described in claim 1, a fully prefabricated assembled and superimposed integrated pipe gallery support and construction process is characterized by: The steps include: (1) Processing prefabricated support piles (3), prefabricated cap beams (5), and prefabricated external anchor piles (4); (2) Cleaning the ground surface and laying out the edges of foundation pit support piles; (iii) Driving the support structure: driving prefabricated support piles (3), connecting the prefabricated support piles (3) by means of sockets and spigots, driving prefabricated external anchor piles (4) simultaneously, and connecting the prefabricated cap beam (5) with the prefabricated support piles (3) and the prefabricated external anchor piles (4); (iv) Installation of the prefabricated integrated pipe corridor (1). After the prefabricated integrated pipe corridor (1) is installed, the prefabricated integrated pipe corridor (1) and the prefabricated support piles (3) are connected by a wet method. Structural backfilling. Before backfilling, the gap between the prefabricated integrated pipe corridor (1) and the prefabricated support piles (3) is filled with waterproof mortar.

8. The fully prefabricated, assembled and superimposed integrated pipe gallery support and construction process according to claim 7 is characterized in that: In the step (iii), after the support structure is built for 200m to form a comprehensive support unit, according to the groundwater conditions, if drainage and dewatering are required in the foundation pit, a drainage well is built in the foundation pit and dewatering is carried out.

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