A shaft locking ring beam and large pipe shed combined support structure and its construction method

Abstract

The present invention discloses a shaft locking ring beam and a large pipe shed combined support structure and an application method thereof, which belongs to the field of building construction technology. The shaft locking ring beam and the large pipe shed combined support structure include: a locking ring beam portion, including a bottom locking ring beam and a top locking ring beam, the bottom locking ring beam is a frame structure formed by splicing a plurality of bottom locking ring beam blocks, the top locking ring beam is superimposed on the bottom locking ring beam, and the top locking ring beam is a frame structure formed by splicing a plurality of top locking ring beam blocks; a large pipe shed portion, including a plurality of steel pipe fittings, the upper end of each steel pipe fitting is connected to the bottom locking ring beam, and the lower end of each steel pipe fitting can extend into the stratum. The locking ring beam portion of the present invention is a prefabricated structure, and the assembled construction ensures the construction quality of the reinforced concrete structure and improves the construction efficiency; the locking ring beam portion, the large pipe shed portion and the grouting body form an integral rigid force system, which improves the overall stability and bearing capacity of the locking ring beam of the interface project.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, in particular to a shaft locking ring beam and large pipe shed combined support structure and a construction method thereof. Background Art

[0002] Vertical shafts are widely used in urban rail transit construction as important auxiliary structures of subway stations (such as emergency exits and air ducts) and main construction passages of underground subway stations.

[0003] Vertical shafts are usually constructed using the inverted shaft wall method or the segmented cast-in-place circular caisson method, which is divided into the construction of the locking ring beam and the shaft body. The locking ring beam is generally a cast-in-place reinforced concrete structure. Although the locking ring beam has a single size and a regular structure, the casting process requires the erection of formwork, tying of steel bars, pouring and curing of concrete, resulting in cumbersome procedures, large workloads, and long construction periods. It also generates a large amount of construction waste and violates the concept of green construction. During the construction process, the locking ring beam also needs to bear construction loads such as the drilling rig workbench; especially when encountering unfavorable geological conditions such as soft upper part and hard lower part, when the vertical shaft adopts open excavation at the top and dark excavation at the bottom, the locking ring beam at the boundary between the light and dark structure (soil layer or soft rock) will also bear part of the self-weight load of the open excavation structure, making it difficult to meet the requirements for the overall stability and bearing capacity of the locking ring beam, further increasing construction risks and hidden dangers.

[0004] In the prior art, Chinese patent CN 208415313 U provides a temporary structure for an assembled shaft locking ring beam made of steel plates. Although it overcomes the problems of multiple cast-in-place processes and long construction periods, the above patent has the following disadvantages: first, it cannot provide prefabricated assembled reinforced concrete permanent structural components; second, it is difficult to provide sufficient bearing capacity to resist construction loads and superstructure loads. In summary, the above patent cannot be used for the design and construction of locking ring beams at the light and dark boundaries of shaft structures in poor geology. Therefore, there is an urgent need for a combined support structure of a shaft locking ring beam and a large pipe shed and a method for its construction. Summary of the Invention

[0005] The purpose of the present invention is to provide a combined support structure of a shaft locking ring beam and a large pipe shed and a construction method thereof. The structure is a prefabricated structure that can be constructed in an assembled manner. The assembled construction ensures the construction quality of the reinforced concrete structure and improves the construction efficiency. The locking ring beam part, the large pipe shed part and the grouting body form an integral rigid force system, which improves the overall stability and bearing capacity of the locking ring beam of the interface project.

[0006] As conceived above, the technical solution adopted by the present invention is:

[0007] A shaft locking ring beam and large pipe shed combined support structure, comprising:

[0008] The locking ring beam portion includes a bottom locking ring beam and a top locking ring beam, wherein the bottom locking ring beam is a frame structure formed by splicing a plurality of bottom locking ring beam blocks, and the top locking ring beam is superimposed on the bottom locking ring beam, and the top locking ring beam is a frame structure formed by splicing a plurality of top locking ring beam blocks;

[0009] The large pipe shed includes several steel pipe fittings. The upper end of each steel pipe fitting is connected to the bottom locking ring beam, and the lower end of each steel pipe fitting can extend into the stratum. Several steel pipe fittings are arranged at intervals along the circumference of the bottom locking ring beam, and grouting can be performed in the steel pipe fittings.

[0010] As a preferred solution for the above-mentioned shaft locking ring beam and large pipe shed combined support structure, each of the bottom locking ring beam blocks is provided with a first bolt hand hole. After the two adjacent bottom locking ring beam blocks are spliced ​​into place, the first connecting piece passes through the two first bolt hand holes that are interconnected to fix the two adjacent bottom locking ring beam blocks in connection.

[0011] As a preferred solution for the above-mentioned shaft locking ring beam and large pipe shed combined support structure, each of the top-level locking ring beam blocks is provided with a second bolt hand hole. After the two adjacent top-level locking ring beam blocks are spliced ​​into place, the second connecting piece passes through the two second bolt hand holes that are interconnected to fix the two adjacent top-level locking ring beam blocks in connection.

[0012] As a preferred solution of the above-mentioned shaft locking ring beam and large pipe shed combined support structure, the adjacent bottom locking ring beam blocks and the top locking ring beam blocks are fixedly connected by bolts.

[0013] As a preferred solution for the above-mentioned shaft locking ring beam and large pipe shed combined support structure, a water blocking hole is provided between the upper and lower adjacent bottom locking ring beam blocks and the top locking ring beam blocks, and water blocking material is provided in the water blocking hole.

[0014] As a preferred solution of the above-mentioned shaft locking ring beam and large pipe shed combined support structure, the steel pipe fittings include:

[0015] A steel pipe body, wherein the upper end of the steel pipe body is connected to the bottom locking ring beam, the lower end of the steel pipe body can extend into the stratum, and the side wall of the steel pipe body is provided with grouting holes;

[0016] A grouting nozzle is provided at the upper end opening of the steel pipe body;

[0017] The cone head is arranged at the lower end of the steel pipe body.

[0018] As a preferred solution of the above-mentioned shaft locking ring beam and large pipe shed combined support structure, the steel pipe member also includes a steel cage, and the steel cage is arranged in the steel pipe body.

[0019] As a preferred solution of the above-mentioned shaft locking ring beam and large pipe shed combined support structure, a fixing ring is provided on the steel cage, and each main reinforcement of the steel cage is connected to the fixing ring.

[0020] A method for constructing a shaft locking ring beam and a large pipe shed combined support structure is provided, and is used to construct and form the above-mentioned shaft locking ring beam and a large pipe shed combined support structure, comprising the following steps:

[0021] S1, prefabricate the bottom locking ring beam block and the top locking ring beam block, wherein the bottom locking ring beam block is reserved with a plurality of steel pipe guide holes;

[0022] S2. At the construction site, assembling a plurality of bottom locking ring beam blocks to form a bottom locking ring beam;

[0023] S3, driving the steel pipe fittings downward into the formation through the steel pipe fitting guide holes to a set length, until one steel pipe fitting is driven into each of the steel pipe fitting guide holes;

[0024] S4, grouting is performed into the steel pipe by adopting a skip hole method at intervals;

[0025] S5. Assembling a plurality of the top-level locking ring beam blocks on the bottom-level locking ring beam to form a top-level locking ring beam.

[0026] As a preferred solution for the construction method of the above-mentioned shaft locking ring beam and large pipe shed combined support structure, in step S5, after the top-level locking ring beam is assembled, the adjacent bottom-level locking ring beam blocks and the top-level locking ring beam blocks are fixedly connected by bolts.

[0027] Beneficial effects of the present invention:

[0028] The present invention proposes a combined support structure of a shaft locking ring beam and a large pipe shed, in which the bottom locking ring beam and the top locking ring beam of the locking ring beam portion can be spliced ​​together. Before construction, the bottom locking ring beam blocks and the top locking ring beam blocks are prefabricated first; at the construction site, after the vertical shaft open excavation structure is completed and the locking foundation pit is excavated, a number of bottom locking ring beam blocks are first used to splice together to form the bottom locking ring beam, and then a number of steel pipe fittings of the large pipe shed portion are passed through the bottom locking ring beam and driven into the stratum; then, on the upper surface of the bottom locking ring beam, a number of top locking ring beam blocks are used to splice together to form the top locking ring beam. In this way, first, the locking ring beam portion is a prefabricated structure, which ensures the construction quality of the reinforced concrete structure. Secondly, the large pipe shed support has high rigidity and good support effect. The placement of heavy objects around the construction site has little impact on the foundation pit. Grouting can be carried out in the steel pipe fittings of the large pipe shed to form a grouting body, and the grouting reinforces the stratum to provide prefabricated assembled reinforced concrete permanent structural components. The top-level locking ring beam provides a pre-compression reaction force to the end of the large pipe shed, so that the top-level locking ring beam, the bottom-level locking ring beam and the large pipe shed and the grouting body form an overall rigid force system, similar to the "pile foundation support beam" structure, which greatly improves the overall stability and bearing capacity of the shaft locking ring beam and the large pipe shed joint support structure, and ensures the safety of the underground shaft construction and operation period. The shaft locking ring beam and the large pipe shed joint support structure can be used for the design and construction of the locking ring beam at the light and dark boundary of the shaft structure in poor geology.

[0029] The method for constructing the combined support structure of the shaft locking ring beam and the large pipe shed proposed by the present invention is as follows: first, a bottom locking ring beam block and a top locking ring beam block are prefabricated, and a plurality of steel pipe guide holes are reserved on the bottom locking ring beam block; then, at the construction site, a plurality of bottom locking ring beam blocks are assembled to form a bottom locking ring beam; then, the steel pipes are driven downward to a set length through the steel pipe guide holes until a steel pipe is driven into each steel pipe guide hole; further, grouting is performed into the steel pipes in an intermittent skipping manner to ensure the position stability of the steel pipes in the stratum; finally, a plurality of top locking ring beam blocks are assembled on the bottom locking ring beam to form a top locking ring beam. In this way, the overall stability and bearing capacity of the combined support structure of the shaft locking ring beam and the large pipe shed are greatly improved, and the safety of the underground shaft construction and operation period is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0031] Figure 1This is a front view of the shaft locking ring beam and large pipe shed combined support structure provided in the first embodiment of the present invention;

[0032] Figure 2 1 is a top view of the locking ring beam portion provided in the first embodiment of the present invention;

[0033] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of the AA section;

[0034] Figure 4 yes Figure 3 Schematic diagram of part of the structure;

[0035] Figure 5 yes Figure 2 Schematic diagram of the middle B direction;

[0036] Figure 6 yes Figure 2 Schematic diagram of the cross-sectional structure of the CC section;

[0037] Figure 7 yes Figure 2 Schematic diagram of the middle D direction;

[0038] Figure 8 After the construction of the shaft lock ring beam and the large pipe shed joint support structure is completed, Figure 2 Schematic diagram of the cross-sectional structure of the EE section;

[0039] Figure 9 1 is a schematic cross-sectional structural diagram of a bottom layer locking ring beam block and a top layer locking ring beam block that are adjacent to each other and fixedly connected, provided by the first embodiment of the present invention;

[0040] Figure 10 1 is a schematic cross-sectional view of two adjacent bottom locking ring beam blocks after being fixedly connected, provided by the first embodiment of the present invention;

[0041] Figure 11 1 is a schematic cross-sectional view of two adjacent top-level locking ring beam blocks after being fixedly connected, provided by the first embodiment of the present invention;

[0042] Figure 12 Schematic diagram of a steel cage provided in a steel pipe according to a first embodiment of the present invention;

[0043] Figure 13 1 is a schematic structural diagram of a steel pipe provided in Example 1 of the present invention;

[0044] Figure 14 This is a schematic diagram of two steel pipe bodies provided in the first embodiment of the present invention being connected by threads;

[0045] Figure 15 1 is a top view of the bottom locking ring beam provided in the first embodiment of the present invention;

[0046] Figure 16 It is a flow chart of the construction method of the shaft locking ring beam and large pipe shed combined support structure provided in the second embodiment of the present invention.

[0047] In the picture:

[0048] 1. Locking ring beam;

[0049] 11. Bottom-layer locking ring beam; 111. Bottom-layer locking ring beam block; 1111. First bolt hand hole; 1112. First connecting piece; 1113. Third bottom-layer locking ring beam block; 1114. Third bolt hand hole; 1115. First bottom-layer locking ring beam block; 1116. Second bottom-layer locking ring beam block; 1117. Steel pipe guide hole; 12. Top-layer locking ring beam; 121. Top-layer locking ring beam block; 1211. Second bolt hand hole; 1212. Second connecting piece; 1213. Second top-layer locking ring beam block; 1214. First top-layer locking ring beam block;

[0050] 1215, fourth bolt hand hole;

[0051] 2. Large pipe shed; 21. Steel pipe fittings; 211. Steel pipe body; 2111. Grouting hole; 212. Grouting nozzle; 213. Cone head; 214. Reinforcement cage; 215. Fixing ring;

[0052] 3. The third connecting piece;

[0053] 4. Water blocking materials;

[0054] 5. Thread;

[0055] 6. Concrete cushion;

[0056] 7. Backfill department. DETAILED DESCRIPTION

[0057] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0058] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0059] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0060] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0061] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0062] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0063] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0064] Example 1

[0065] See also Figures 1-15 This embodiment provides a shaft locking ring beam and large pipe shed combined support structure, which can provide stable support for the shaft.

[0066] Specifically, see Figure 1-Figure 5 In this embodiment, the shaft locking ring beam and large pipe shed combined support structure includes a locking ring beam portion 1 and a large pipe shed portion 2.

[0067] The locking ring beam portion 1 includes a bottom locking ring beam 11 and a top locking ring beam 12. The bottom locking ring beam 11 is a frame structure formed by splicing several bottom locking ring beam blocks 111. The top locking ring beam 12 is superimposed on the bottom locking ring beam 11. The top locking ring beam 12 is a frame structure formed by splicing several top locking ring beam blocks 121.

[0068] The large pipe shed 2 includes several steel pipe fittings 21. The upper end of each steel pipe fitting 21 is connected to the bottom locking ring beam 11, and the lower end of each steel pipe fitting 21 can extend into the stratum. Several steel pipe fittings 21 are arranged at intervals along the circumference of the bottom locking ring beam 11, and grouting can be performed in the steel pipe fittings 21.

[0069] The present embodiment provides a combined support structure of the shaft locking ring beam and the large pipe shed, and the bottom locking ring beam 11 and the top locking ring beam 12 of the locking ring beam portion 1 can be spliced ​​together. Before construction, the bottom locking ring beam block 111 and the top locking ring beam block 121 are prefabricated first; at the construction site, after the shaft open excavation structure is completed and the locking foundation pit is excavated, a plurality of bottom locking ring beam blocks 111 are first used to splice and form the bottom locking ring beam 11, and then a plurality of steel pipe fittings 21 of the large pipe shed portion 2 are passed through the bottom locking ring beam 11 and driven into the ground; then, on the upper surface of the bottom locking ring beam 11, a plurality of top locking ring beam blocks 121 are used to splice and form the top locking ring beam 12. In this way, when the locking ring beam portion 1 is formed during construction, there is no need to erect formwork, tie steel bars, pour and maintain concrete on site. The construction process of the locking ring beam portion 1 is simple, easy to operate and can be completed quickly, thereby improving construction efficiency.

[0070] The locking ring beam 1 is a prefabricated structure, prefabricated in the factory to ensure the quality of the reinforced concrete structure. The large pipe shed 2 offers high rigidity and effective support, minimizing the impact of heavy objects placed around the construction site on the foundation pit. Grouting can be performed within the steel pipe fittings 21. Once the injected grout solidifies, it forms a new grouting body, reinforcing the ground, thus providing a prefabricated, assembled reinforced concrete permanent structural component. The upper end of each steel pipe fitting 21 is connected to the bottom locking ring beam 11, and the lower end of each steel pipe fitting 21 can extend into the stratum. The top locking ring beam 12 is superimposed on the bottom locking ring beam 11, so that the top locking ring beam 12 provides a pre-compression reaction force to the end of the large pipe shed 2, so that the top locking ring beam 12 and the bottom locking ring beam 11, the two layers of locking ring beams and the large pipe shed 2 and the grouting body form an overall rigid force system, similar to the "pile foundation support beam" structure, which greatly improves the overall stability and bearing capacity of the shaft locking ring beam and the large pipe shed combined support structure, and ensures the safety of the underground shaft construction and operation period. The shaft locking ring beam and the large pipe shed combined support structure can be used for the design and construction of the locking ring beam at the light and dark boundary of the shaft structure in poor geology.

[0071] See also Figure 2-Figure 6 ,as well as Figure 11 To ensure the stability and load-bearing capacity of the top-level locking ring beam 12, and thus the stability and load-bearing capacity of the locking ring beam section 1, each top-level locking ring beam block 121 is provided with a second bolt hand hole 1211. After two adjacent top-level locking ring beam blocks 121 are spliced ​​into place, the second connecting member 1212 passes through the two interconnected second bolt hand holes 1211 to securely connect the two adjacent top-level locking ring beam blocks 121. This arrangement ensures that the positional relationship between the two adjacent top-level locking ring beam blocks 121 is stable.

[0072] Optionally, in this embodiment, the second connecting member 1212 includes a bent bolt and a nut, that is, two adjacent top-level locking ring beam blocks 121 are fixedly connected by bolts.

[0073] Specifically, see Figure 2 and Figure 3 In this embodiment, the top-level locking ring beam block 121 includes two structures. For the convenience of description, the top-level locking ring beam blocks 121 of the two structures are respectively referred to as the first top-level locking ring beam block 1214 and the second top-level locking ring beam block 1213. The first top-level locking ring beam block 1214 is a rectangular parallelepiped, which is used to splice to form the two long sides of the top-level locking ring beam 12; the second top-level locking ring beam block 1213 is an "L"-shaped block, which is used to splice to the corners of the top-level locking ring beam 12 and directly form the two short sides of the top-level locking ring beam 12.

[0074] Specifically, see Figure 3-Figure 6 ,as well as Figure 10To ensure the stability and load-bearing capacity of the bottom-level locking ring beam 11, and thus the stability and load-bearing capacity of the locking ring beam portion 1, in this embodiment, each bottom-level locking ring beam block 111 is provided with a first bolt hand hole 1111. After two adjacent bottom-level locking ring beam blocks 111 are spliced ​​into place, a first connecting member 1112 passes through the two interconnected first bolt hand holes 1111 to securely connect the two adjacent bottom-level locking ring beam blocks 111. This arrangement ensures a stable positional relationship between the two adjacent bottom-level locking ring beam blocks 111.

[0075] The two adjacent bottom locking ring beam blocks 111 are fixedly connected by a first connecting member 1112. Optionally, in this embodiment, the first connecting member 1112 includes a bent bolt and a nut, that is, the two adjacent bottom locking ring beam blocks 111 are fixedly connected by a bolt.

[0076] Specifically, see Figure 15 In this embodiment, the bottom locking ring beam block 111 has three structures. For the convenience of description, the bottom locking ring beam blocks 111 of the three structures are respectively referred to as the first bottom locking ring beam block 1115, the second bottom locking ring beam block 1116 and the third bottom locking ring beam block 1113; the first bottom locking ring beam block 1115 is a rectangular block, which is used to splice to form the long side of the bottom locking ring beam 11; the second bottom locking ring beam block 1116 is a rectangular block, which is used to splice to form the short side of the bottom locking ring beam 11; the third bottom locking ring beam block 1113 is an "L"-shaped block, and a third bottom locking ring beam block 1113 is provided at each of the four corners of the bottom locking ring beam 11.

[0077] Preferably, in this embodiment, steel pipe guide holes 1117 are provided on the first bottom locking ring beam block 1115 , the second bottom locking ring beam block 1116 and the third bottom locking ring beam block 1113 to guide the installation of the steel pipe 21 .

[0078] More preferably, see Figure 3 、 Figure 4 、 Figure 6 and Figure 9 In this embodiment, the upper and lower adjacent bottom locking ring beam blocks 111 and the top locking ring beam blocks 121 are fixedly connected. Such an arrangement can further ensure the stability and bearing capacity of the locking ring beam portion 1.

[0079] Specifically, a third bolt hand hole 1114 is provided on the bottom locking ring beam block 111 on the lower layer, and a fourth bolt hand hole 1215 is provided on the top locking ring beam block 121 on the upper layer. The third bolt hand hole 1114 and the fourth bolt hand hole 1215 are provided in a one-to-one correspondence. The third connecting member 3 passes through the third bolt hand hole 1114 and the fourth bolt hand hole 1215 to securely connect the adjacent bottom locking ring beam block 111 and the top locking ring beam block 121, thereby ensuring the structural stability of the locking ring beam portion 1.

[0080] Alternatively, see Figure 9 In this embodiment, the third connecting member 3 includes a bent bolt and a nut. The adjacent bottom locking ring beam block 111 and the top locking ring beam block 121 are fixedly connected by the third connecting member 3, that is, fixedly connected by bolts.

[0081] The first connecting member 1112, the second connecting member 1212 and the third connecting member 3 have the same structure, which is convenient for improving the construction progress. Specifically, the bent bolts and nuts can be purchased on the market.

[0082] The arrangement of the first connecting member 1112, the second connecting member 1212 and the third connecting member 3 can ensure the stability and bearing capacity of the locking ring beam portion 1, so that the locking ring beam portion 1 can adapt to the light and dark boundary of the structure in poor geological conditions.

[0083] Specifically, see Figure 6 and Figure 9 A water blocking hole is provided between the upper and lower adjacent bottom locking ring beam blocks 111 and the top locking ring beam blocks 121, and a water blocking material 4 is provided in the water blocking hole.

[0084] Specifically, in this embodiment, water blocking holes are provided on both the bottom locking ring beam block 111 and the top locking ring beam block 121 . The two water blocking holes are interconnected to form a large water blocking hole filled with water blocking material 4 .

[0085] Specifically, see Figure 12-14 The steel pipe fitting 21 includes a steel pipe body 211 , a grouting nozzle 212 and a cone head 213 .

[0086] The upper end of the steel pipe body 211 is connected to the bottom locking ring beam 11, and the lower end of the steel pipe body 211 can extend into the stratum. The side wall of the steel pipe body 211 is provided with a grouting hole 2111.

[0087] It can be understood that the steel pipe body 211 is a hollow structure.

[0088] The grouting nozzle 212 is provided at the upper opening of the steel pipe body 211 .

[0089] The cone head 213 is disposed at the lower end of the steel pipe body 211 .

[0090] Optionally, in this embodiment, the wall thickness of the steel pipe body 211 is at least 8 mm; optionally, the diameter of the steel pipe body 211 is 80 mm-160 mm, such as 89 mm, 108 mm, 127 mm or 159 mm.

[0091] The cone head 213 provided at the lower end of the steel pipe body 211 facilitates rapid driving of the steel pipe body 211 into the ground. After the steel pipe body 211 has been driven into the ground to a predetermined length, a grouting nozzle 212 is installed at the upper end of the steel pipe body 211. Grouting is performed using a skip-hole method (i.e., one of any two adjacent steel pipe bodies 211 is not grouted) to prevent grout from crossing when both adjacent steel pipe bodies 211 are grouted.

[0092] When grouting is injected into the steel pipe body 211 , the injected slurry can overflow through the grouting holes 2111 on the side wall of the steel pipe body 211 , thereby ensuring the position stability of the steel pipe body 211 in the bottom layer.

[0093] Specifically, the grouting slurry can be cement slurry. When groundwater is relatively developed or the slurry diffusion range is large, the grouting slurry can be changed to cement-water glass double liquid slurry.

[0094] Specifically, the length of the steel pipe fitting 21 can be set as needed; when the length of the steel pipe fitting 21 does not meet the design requirements, the two steel pipe bodies 211 can be connected together using a thread 5, and the grouting nozzle 212 is located at the upper end opening of the uppermost steel pipe body 211; the cone head 213 is arranged at the lower end of the lowermost steel pipe body 211.

[0095] Furthermore, in this embodiment, the steel pipe 21 further includes a steel cage 214, which is disposed in the steel pipe body 211. The steel cage 214 can improve the bending strength of the steel pipe 21.

[0096] A fixing ring 215 is provided on the steel cage 214, and each main bar of the steel cage 214 is connected to the fixing ring 215. Specifically, in this embodiment, the steel cage 214 includes four main bars, which are evenly spaced along the circumference of the fixing ring 215. Each main bar is welded to the outer side of the fixing ring 215. Preferably, a plurality of fixing rings 215 are spaced apart along the extension direction of the steel cage 214.

[0097] Specifically, after the grouting is completed, the slurry solidifies to form a grouting body.

[0098] In this embodiment, the locking ring beam portion 1 is prefabricated to expedite construction. The first, second, and third connectors 1112, 1212, and 3 are easily installed, ensuring the overall stability of the locking ring beam portion 1. Water blocking holes are provided between the adjacent bottom and top locking ring beam blocks 111, 121. Water blocking material 4 is placed within the water blocking holes to ensure effective waterproofing between the bottom and top locking ring beams 11, 12. The large pipe shed 2 has high rigidity and good supporting effect, and the placement of heavy objects around the construction site has little impact on the foundation pit; the steel pipe fittings 21 of the large pipe shed 2 are reinforced by grouting the stratum, and the top-level locking ring beam 12 provides a pre-compression reaction force to the end of the steel pipe fittings 21 of the large pipe shed 2, so that the top-level locking ring beam 12, the bottom-level locking ring beam 11 and the two layers of locking ring beams and the large pipe shed 2 and the grouting body form an overall rigid force system, similar to the "pile foundation support beam" structure, which greatly improves the overall stability and bearing capacity of the locking ring beam part 1, and ensures the safety of the underground vertical shaft construction and operation period.

[0099] Example 2

[0100] See also Figure 16 This embodiment provides a method for constructing a shaft locking ring beam and a large pipe shed combined support structure, which is used to construct the shaft locking ring beam and the large pipe shed combined support structure in Example 1.

[0101] Specifically, the construction method of the shaft locking ring beam and the large pipe shed combined support structure includes the following steps:

[0102] S1, prefabricate the bottom locking ring beam block 111 and the top locking ring beam block 121, and reserve a number of steel pipe guide holes 1117 on the bottom locking ring beam block 111;

[0103] S2. At the construction site, assemble several bottom locking ring beam blocks 111 to form a bottom locking ring beam 11;

[0104] S3, driving the steel pipe 21 downward into the formation through the steel pipe guide hole 1117 to a set length, until one steel pipe 21 is driven into each steel pipe guide hole 1117;

[0105] S4, grouting is performed into the steel pipe 21 by using a skip hole method at intervals;

[0106] S5. Assemble several top-level locking ring beam blocks 121 on the bottom-level locking ring beam 11 to form a top-level locking ring beam 12.

[0107] The present embodiment provides a method for constructing a combined support structure of a shaft locking ring beam and a large pipe shed. First, a bottom locking ring beam block 111 and a top locking ring beam block 121 are prefabricated, and a plurality of steel pipe guide holes 1117 are reserved on the bottom locking ring beam block 111; then, at the construction site, a plurality of bottom locking ring beam blocks 111 are assembled to form a bottom locking ring beam 11; then, the steel pipe 21 is passed through the steel pipe guide hole 1117 and driven downward to a set length, until a steel pipe 21 is driven into each steel pipe guide hole 1117; further, grouting is performed into the steel pipe 21 in an intermittent skipping manner to ensure the position stability of the steel pipe 21 in the stratum; finally, a plurality of top locking ring beam blocks 121 are assembled on the bottom locking ring beam 11 to form a top locking ring beam 12. In this way, when the locking ring beam portion 1 is constructed, there is no need to erect formwork on site, tie steel bars, pour and maintain concrete. The construction process of the locking ring beam portion 1 is simple, easy to operate and can be completed quickly, thereby improving construction efficiency.

[0108] Specifically, in step S1, the bottom locking ring beam block 111 and the top locking ring beam block 121 are prefabricated according to the hydrogeology and structural design. More specifically, according to the engineering geology, hydrogeology, structural design, site overview and transportation conditions, the bottom locking ring beam 11 and the top locking ring beam 12 are reasonably divided into blocks so that the bottom locking ring beam 11 and the top locking ring beam 12 are staggered and assembled. The size and layout spacing of the steel pipe guide holes 1117 are reasonably designed according to the large pipe shed 2 used, and prefabricated.

[0109] Specifically, a guide tube is pre-buried in the guide hole 1117 of the steel pipe.

[0110] It can be understood that the second bolt hand hole 1211 and the fourth bolt hand hole 1215 of the top-layer locking ring beam block 121 are integrally formed with the top-layer locking ring beam block 121 .

[0111] The first bolt hand hole 1111 and the third bolt hand hole 1114 on the bottom locking ring beam block 111 are integrally formed with the bottom locking ring beam block 111 .

[0112] Specifically, in this embodiment, before step S2, the following operations need to be performed:

[0113] Excavation of foundation pit.

[0114] Specifically, before the foundation pit is excavated, the open-cut structure of the vertical shaft is completed.

[0115] Specifically, when excavating the foundation pit, the slope is laid with an appropriate gradient and mechanical excavation is carried out to the bottom surface design elevation of the bottom locking ring beam 11, and then the site is leveled; further, the temporary slope can be appropriately reinforced according to actual conditions, and a concrete cushion layer 6 can be laid within the range of the locking ring beam part 1 at the bottom of the pit.

[0116] Specifically, in step S2, several bottom-level locking ring beam blocks 111 are assembled on the concrete cushion layer 6 to form the bottom-level locking ring beam 11. After assembly, all first connectors 1112 are installed one by one. Water-blocking material 4 is filled into the water-blocking holes of the bottom-level locking ring beam blocks 111. At this point, the bottom-level locking ring beam 11 is assembled. Subsequently, concrete is backfilled between the bottom-level locking ring beam 11 and the temporary slope to the top elevation of the bottom-level locking ring beam 11.

[0117] Specifically, step S3 includes the following steps:

[0118] A drilling rig is set up, and the steel pipe 21 is driven downward into the stratum through the steel pipe guide hole 1117 to a set length, until a steel pipe 21 is driven into each steel pipe guide hole 1117 .

[0119] Specifically, in step S4, after the steel pipe 21 is driven to a preset length, the grouting nozzle 212 is installed, and grouting is performed by using an interval skipping hole method (that is, one of any two adjacent steel pipe bodies 211 is not grouted) to avoid grouting when both adjacent steel pipe bodies 211 are grouted.

[0120] Specifically, in step S5, during the process of assembling a plurality of top-level locking ring beam blocks 121 on the bottom-level locking ring beam 11 to form the top-level locking ring beam 12, after two adjacent top-level locking ring beam blocks 121 are spliced ​​in place, the second connecting member 1212 is passed through the two interconnected second bolt hand holes 1211 to securely connect the two adjacent top-level locking ring beam blocks 121. At the same time, the water blocking holes of the top-level locking ring beam blocks 121 are filled with water blocking material 4 to ensure effective waterproofing of the interface.

[0121] Furthermore, in step S5, after the top-level locking ring beam 12 is assembled, the two adjacent bottom-level locking ring beam blocks 111 and the top-level locking ring beam block 121 are fixedly connected by bolts. Specifically, the third connecting member 3 is passed through the third bolt hand hole 1114 and the fourth bolt hand hole 1215 to fix the two upper and lower adjacent bottom-level locking ring beam blocks 111 and the top-level locking ring beam block 121 to ensure the structural stability of the locking ring beam portion 1.

[0122] After the two adjacent bottom locking ring beam blocks 111 and the top locking ring beam block 121 are fixedly connected, the locking ring beam portion 1 is formed. Finally, concrete is backfilled between the locking ring beam portion 1 and the temporary slope to the top surface elevation of the top locking ring beam 12.

[0123] The concrete backfilled between the locking ring beam portion 1 and the temporary slope forms a backfill portion 7 .

[0124] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for constructing a combined support structure of a shaft locking ring beam and a large pipe shed, characterized in that: The shaft locking ring beam and large pipe shed combined support structure formed during construction comprises: The locking ring beam portion (1) comprises a bottom locking ring beam (11) and a top locking ring beam (12), wherein the bottom locking ring beam (11) is a frame structure formed by splicing a plurality of bottom locking ring beam blocks (111), and the top locking ring beam (12) is superimposed on the bottom locking ring beam (11), and the top locking ring beam (12) is a frame structure formed by splicing a plurality of top locking ring beam blocks (121); The large pipe shed (2) comprises a plurality of steel pipe members (21), the upper end of each of the steel pipe members (21) being connected to the bottom locking ring beam (11), the lower end of each of the steel pipe members (21) being capable of extending into the stratum, the plurality of steel pipe members (21) being arranged at intervals along the circumference of the bottom locking ring beam (11), and grouting being capable of being performed in the steel pipe members (21); Each of the bottom locking ring beam blocks (111) is provided with a first bolt hand hole (1111); after two adjacent bottom locking ring beam blocks (111) are spliced ​​into place, a first connecting member (1112) passes through the two first bolt hand holes (1111) that are interconnected to fix the two adjacent bottom locking ring beam blocks (111); Each of the top-level locking ring beam blocks (121) is provided with a second bolt hand hole (1211); after two adjacent top-level locking ring beam blocks (121) are spliced ​​into place, a second connecting member (1212) passes through the two second bolt hand holes (1211) that are interconnected to fix the two adjacent top-level locking ring beam blocks (121); The adjacent bottom locking ring beam blocks (111) and the top locking ring beam blocks (121) are fixedly connected by bolts; The construction method of the shaft locking ring beam and large pipe shed combined support structure comprises the following steps: S1, prefabricating a bottom locking ring beam block (111) and a top locking ring beam block (121), wherein the bottom locking ring beam block (111) is provided with a plurality of steel pipe guide holes (1113); S2, at the construction site, assembling a plurality of bottom locking ring beam blocks (111) to form a bottom locking ring beam (11); S3, driving the steel pipe (21) downward into the formation through the steel pipe guide hole (1113) to a set length, until one steel pipe (21) is driven into each of the steel pipe guide holes (1113); S4, grouting is performed into the steel pipe (21) by adopting a skip hole method at intervals; S5, assembling a plurality of the top-level locking ring beam blocks (121) on the bottom-level locking ring beam (11) to form a top-level locking ring beam (12).

2. The construction method of the shaft locking ring beam and large pipe shed combined support structure according to claim 1 is characterized in that: A water blocking hole is provided between the upper and lower adjacent bottom locking ring beam blocks (111) and the top locking ring beam blocks (121), and a water blocking material (4) is provided in the water blocking hole.

3. The construction method of the shaft locking ring beam and large pipe shed combined support structure according to claim 1 or 2 is characterized in that: The steel pipe (21) comprises: A steel pipe body (211), the upper end of the steel pipe body (211) being connected to the bottom locking ring beam (11), the lower end of the steel pipe body (211) being capable of extending into the stratum, and the side wall of the steel pipe body (211) being provided with a grouting hole (2111); A grouting nozzle (212) is provided at the upper opening of the steel pipe body (211); The cone head (213) is arranged at the lower end of the steel pipe body (211).

4. The construction method of the shaft locking ring beam and large pipe shed combined support structure according to claim 3 is characterized in that: The steel pipe member (21) further comprises a steel cage (214), wherein the steel cage (214) is arranged in the steel pipe body (211).

5. The construction method of the shaft locking ring beam and large pipe shed combined support structure according to claim 4 is characterized in that: A fixing ring (215) is provided on the steel cage (214), and each main reinforcement of the steel cage (214) is connected to the fixing ring (215).

6. The construction method of the shaft locking ring beam and large pipe shed combined support structure according to claim 1 is characterized in that: In step S5, after the top-level locking ring beam (12) is assembled, the adjacent bottom-level locking ring beam blocks (111) and the top-level locking ring beam blocks (121) are fixedly connected by bolts.

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