CN117365488A - Shaft locking collar beam and greenhouse combined supporting structure and construction method thereof - Google Patents

Abstract

The invention discloses a shaft locking collar beam and big pipe shed combined support structure and a construction method thereof, which belong to the technical field of building construction, wherein the shaft locking collar beam and big pipe shed combined support structure comprises: the fore shaft collar beam part comprises a bottom layer fore shaft collar beam and a top layer fore shaft collar beam, wherein the bottom layer fore shaft collar beam is a frame structure formed by splicing a plurality of bottom layer fore shaft collar beam blocks, the top layer fore shaft collar beam is overlapped on the bottom layer fore shaft collar beam, and the top layer fore shaft collar beam is a frame structure formed by splicing a plurality of top layer fore shaft collar beam blocks; the greenhouse comprises a plurality of steel pipes, wherein the upper end of each steel pipe is connected with a bottom locking collar beam, and the lower end of each steel pipe can extend into a stratum. The locking collar beam part is of a prefabricated structure, so that the construction quality of the reinforced concrete structure is guaranteed by the assembly type construction, and the construction efficiency is improved; the locking collar beam part, the big pipe shed part and the grouting body form an integral rigid stress system, so that the integral stability and the bearing capacity of the locking collar beam of the interface engineering are improved.

Description

Shaft locking collar beam and greenhouse combined supporting structure and construction method thereof

Technical Field

The invention relates to the technical field of building construction, in particular to a shaft locking collar beam and big pipe shed combined supporting structure and a construction method thereof.

Background

The vertical shaft is used as an important auxiliary structure (such as a safety port and an air duct) of the subway station and a main construction channel of the subway station by a subsurface excavation method, and is widely applied to urban rail transit construction.

The shaft is generally constructed by adopting a reverse wall method or a segmented cast-in-situ circular open caisson method, and is divided into a locking collar beam and a well body, wherein the locking collar beam is generally constructed by adopting a cast-in-situ reinforced concrete structure. The locking collar beam has single size and regular structure, but needs to erect templates, bind steel bars, pour and maintain concrete in the cast-in-situ process, which causes complicated procedures, large workload and long construction period, generates more construction wastes and violates the green construction concept. In the construction process, the locking collar beam also needs to bear construction loads such as a drilling machine working bench and the like; especially when the upper part open cut and the lower part open cut are adopted in the poor geological shaft such as upper softness and lower hardness, the fore shaft ring beam at the light and shade boundary (soil layer or soft rock) of the structure also bears a part of dead weight load of the open cut structure, so that the overall stability and bearing capacity of the fore shaft ring beam are difficult to meet the requirements, and the construction risk and hidden danger are further increased.

In the prior art, chinese patent CN 208415313U provides a temporary structure of assembled shaft locking collar beam, which is made of steel plate, and overcomes the problems of more cast-in-place procedures and long construction period, but the above patent has the following disadvantages: firstly, a prefabricated reinforced concrete permanent structural member cannot be provided; secondly, it is difficult to provide sufficient bearing capacity against construction loads and superstructure loads. In summary, the above-mentioned patent cannot be used for the design and construction of a lock collar beam at the bright-dark boundary of a shaft structure in poor geology. Therefore, there is a need for a shaft locking collar beam and greenhouse combined support structure and a construction method thereof.

Disclosure of Invention

The invention aims to provide a shaft locking collar beam and large pipe shed combined supporting structure and a construction method thereof, wherein the shaft locking collar beam and large pipe shed combined supporting structure is of a prefabricated structure, can be constructed in an assembled mode, ensures the construction quality of a reinforced concrete structure and improves the construction efficiency; the locking collar beam part, the big pipe shed part and the grouting body form an integral rigid stress system, so that the integral stability and the bearing capacity of the locking collar beam of the interface engineering are improved.

The technical scheme adopted by the invention is as follows:

a shaft locking collar tie beam and big-arch shelter joint support structure includes:

the locking notch ring beam part comprises a bottom layer locking notch ring beam and a top layer locking notch ring beam, wherein the bottom layer locking notch ring beam is of a frame structure formed by splicing a plurality of bottom layer locking notch ring beam blocks, the top layer locking notch ring beam is overlapped on the bottom layer locking notch ring beam, and the top layer locking notch ring beam is of a frame structure formed by splicing a plurality of top layer locking notch ring beam blocks;

the big-arch shelter portion, including a plurality of steel pipe fitting, every the upper end of steel pipe fitting with the collar tie beam of bottom fore shaft is connected, every the lower extreme of steel pipe fitting can extend to in the stratum, a plurality of steel pipe fitting is followed the circumference interval setting of collar tie beam of bottom fore shaft, can carry out the slip casting in the steel pipe fitting.

As a preferred scheme of the shaft locking collar beam and big pipe shed combined supporting structure, each bottom locking collar beam block is provided with a first bolt hand hole, and after two adjacent bottom locking collar beam blocks are spliced in place, a first connecting piece penetrates through the two mutually communicated first bolt hand holes so as to fixedly connect the two adjacent bottom locking collar beam blocks.

As a preferred scheme of the shaft locking collar beam and big pipe shed combined supporting structure, each top layer locking collar beam block is provided with a second bolt hand hole, and after two adjacent top layer locking collar beam blocks are spliced in place, a second connecting piece penetrates through the two second bolt hand holes which are mutually communicated to fixedly connect the two adjacent top layer locking collar beam blocks.

As a preferable scheme of the shaft locking collar beam and big pipe shed combined supporting structure, the adjacent bottom locking collar beam blocks and the top locking collar beam blocks are fixedly connected through bolts.

As a preferable scheme of the shaft locking collar beam and big pipe shed combined supporting structure, water shutoff holes are formed between the bottom locking collar beam blocks and the top locking collar beam blocks, which are adjacent up and down, and water shutoff materials are arranged in the water shutoff holes.

As a preferable scheme of the shaft locking collar beam and big pipe shed combined supporting structure, the steel pipe fitting comprises:

the upper end of the steel pipe body is connected with the bottom layer locking collar beam, the lower end of the steel pipe body can extend into a stratum, and grouting holes are formed in the side wall of the steel pipe body;

the grouting nozzle is arranged at the upper end opening of the steel pipe body;

the conical head is arranged at the lower end of the steel pipe body.

As a preferable scheme of the shaft locking collar beam and big pipe shed combined supporting structure, the steel pipe fitting further comprises a steel reinforcement cage, and the steel reinforcement cage is arranged in the steel pipe body.

As a preferable scheme of the shaft locking collar beam and big pipe shed combined supporting structure, a fixed ring is arranged on the steel reinforcement cage, and each main rib of the steel reinforcement cage is connected with the fixed ring.

A construction method of a shaft locking collar beam and big pipe shed combined support structure is used for constructing and forming the shaft locking collar beam and big pipe shed combined support structure, and comprises the following steps:

s1, prefabricating a bottom layer locking collar beam block and a top layer locking collar beam block, wherein a plurality of steel pipe guide holes are reserved in the bottom layer locking collar beam block;

s2, assembling a plurality of bottom layer locking notch ring beam blocks to form a bottom layer locking notch ring beam on a construction site;

s3, penetrating the steel pipe fitting through the steel pipe fitting guide holes and downwards driving the steel pipe fitting into the stratum to a set length until each steel pipe fitting guide hole is internally driven into one steel pipe fitting;

s4, grouting into the steel pipe fitting in a mode of interval hole jumping;

s5, assembling a plurality of top-layer fore shaft ring beam blocks on the bottom-layer fore shaft ring beam to form a top-layer fore shaft ring beam.

In the step S5, after the top-layer fore shaft collar beam is assembled, the adjacent bottom-layer fore shaft collar beam blocks and the top-layer fore shaft collar beam blocks are fixedly connected by bolts.

The invention has the beneficial effects that:

according to the shaft locking collar beam and big pipe shed combined supporting structure, the bottom locking collar beam and the top locking collar beam of the locking collar beam part can be spliced. Before construction, prefabricating a bottom-layer fore shaft ring beam block and a top-layer fore shaft ring beam block; in a construction site, after the open cut structure of the vertical shaft is constructed, after the excavation of the locking foundation pit is completed, splicing and forming a bottom locking ring beam by adopting a plurality of bottom locking ring beam blocks, and then penetrating a plurality of steel pipe pieces of a greenhouse part through the bottom locking ring beam and driving the steel pipe pieces into the ground; and then splicing and forming the top-layer fore shaft ring beam on the upper surface of the bottom-layer fore shaft ring beam by adopting a plurality of top-layer fore shaft ring beam blocks. Therefore, firstly, the fore shaft circle beam part is the prefabricated structure, has ensured the construction quality of reinforced concrete structure. Secondly, the supporting rigidity of the greenhouse part is high, the supporting effect is good, and the influence of the placement of heavy objects on the periphery of the construction site on the foundation pit is small; grouting can be carried out on the steel pipe fitting of the greenhouse part to form a grouting body, grouting is carried out to strengthen a stratum, and a prefabricated reinforced concrete permanent structural member is provided; the top layer fore shaft collar tie provides pre-compaction counter force to big-arch shelter tip, makes top layer fore shaft collar tie, bottom fore shaft collar tie two-layer fore shaft collar tie and big-arch shelter portion and slip casting body formation an whole rigidity atress system, similar "pile foundation joist" structure, greatly improved the overall stability and the bearing capacity of the joint support structure of shaft fore shaft collar tie and big-arch shelter, ensured the safety of the construction and the operation period of underground excavation shaft, this joint support structure of shaft fore shaft collar tie and big-arch shelter can be used for the design and the construction of the fore shaft collar tie of shaft structure light and shade boundary department in the bad geology.

According to the construction method of the shaft locking collar beam and big pipe shed combined support structure, a bottom locking collar beam block and a top locking collar beam block are prefabricated, and a plurality of steel pipe guide holes are reserved in the bottom locking collar beam block; then, in a construction site, assembling a plurality of bottom-layer fore shaft ring beam blocks to form a bottom-layer fore shaft ring beam; then, the steel pipe fitting penetrates through the steel pipe fitting guide holes to be punched downwards to a set length until each steel pipe fitting guide hole is punched with one steel pipe fitting; further, grouting is carried out in the steel pipe fitting in a mode of interval hole jumping, so that the position stability of the steel pipe fitting in the stratum is ensured; and finally, assembling a plurality of top-layer fore shaft ring beam blocks on the bottom-layer fore shaft ring beam to form the top-layer fore shaft ring beam. Therefore, the overall stability and the bearing capacity of the vertical shaft locking ring beam and large pipe shed combined supporting structure are greatly improved, and the safety of the construction and the operation period of the underground excavation vertical shaft is guaranteed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings needed in the description of the embodiments of the present invention, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the contents of the embodiments of the present invention and these drawings without inventive effort for those skilled in the art.

Fig. 1 is a front view of a shaft locking collar beam and greenhouse combined supporting structure provided by an embodiment of the invention;

FIG. 2 is a top view of a collar beam portion according to a first embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of section A-A of FIG. 2;

FIG. 4 is a partial schematic view of the structure of FIG. 3;

FIG. 5 is a schematic view in the direction B in FIG. 2;

FIG. 6 is a schematic cross-sectional view of section C-C of FIG. 2;

FIG. 7 is a schematic view in the direction D of FIG. 2;

FIG. 8 is a schematic view of the cross-sectional structure of the E-E section in FIG. 2 after the construction of the shaft locking collar beam and the greenhouse combined support structure is completed;

FIG. 9 is a schematic cross-sectional view of a first embodiment of the present invention after a bottom layer collar beam block and a top layer collar beam block are fixedly connected;

FIG. 10 is a schematic cross-sectional view of two adjacent bottom-layer collar beam blocks after being fixedly connected according to the first embodiment of the present invention;

FIG. 11 is a schematic cross-sectional view of two adjacent top-layer collar beam blocks after being fixedly connected according to a first embodiment of the present invention;

fig. 12 is a schematic view of a reinforcement cage provided in accordance with a first embodiment of the present invention disposed within a steel pipe fitting;

FIG. 13 is a schematic view of a steel pipe according to an embodiment of the present invention;

fig. 14 is a schematic view of two steel pipe bodies according to the first embodiment of the present invention when they are connected by screw threads;

FIG. 15 is a top view of a bottom layer collar beam according to one embodiment of the present invention;

fig. 16 is a flowchart of a method for constructing a shaft locking collar beam and greenhouse combined support structure according to a second embodiment of the present invention.

In the figure:

1. a locking collar beam portion;

11. a bottom layer locking collar beam; 111. a bottom layer locking ring beam block; 1111. a first bolt hand hole; 1112. a first connector; 1113. a third bottom layer locking collar beam block; 1114. a third bolt hand hole; 1115. a first bottom layer locking collar beam block; 1116. a second bottom layer locking collar beam block; 1117. a steel pipe fitting guide hole; 12. a top layer locking collar beam; 121. a top layer locking ring beam block; 1211. a second bolt hand hole; 1212. a second connector; 1213. a second top layer locking collar beam block; 1214. a first top layer locking collar beam block;

1215. a fourth bolt hand hole;

2. a greenhouse part; 21. steel pipe fitting; 211. a steel pipe body; 2111. grouting holes; 212. grouting nozzle; 213. a conical head; 214. a reinforcement cage; 215. a fixing ring;

3. a third connecting member;

4. a water shutoff material;

5. threading;

6. a concrete cushion layer;

7. and backfilling part.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

Example 1

Referring to fig. 1-15, the present embodiment provides a shaft locking collar beam and greenhouse combined supporting structure, which can stably support a shaft.

Specifically, referring to fig. 1 to 5, in the present embodiment, a shaft collar beam and greenhouse combined support structure includes a collar beam portion 1 and a greenhouse portion 2.

The fore shaft collar tie beam part 1 includes bottom fore shaft collar tie beam 11 and top layer fore shaft collar tie beam 12, and bottom fore shaft collar tie beam 11 is the frame structure that a plurality of bottom fore shaft collar tie block 111 splice, and top layer fore shaft collar tie beam 12 superposes on bottom fore shaft collar tie beam 11, and top layer fore shaft collar tie beam 12 is the frame structure that a plurality of top layer fore shaft collar tie block 121 splice.

The greenhouse 2 comprises a plurality of steel pipe fittings 21, the upper end of each steel pipe fitting 21 is connected with the bottom layer fore shaft collar beam 11, the lower end of each steel pipe fitting 21 can extend into the stratum, the plurality of steel pipe fittings 21 are arranged along the circumferential interval of the bottom layer fore shaft collar beam 11, and grouting can be carried out on the steel pipe fittings 21.

The shaft fore shaft collar beam and big-arch shelter joint support structure that this embodiment provided, the bottom fore shaft collar beam 11 and the top layer fore shaft collar beam 12 of fore shaft collar beam portion 1 all can splice and form. Before construction, prefabricating a bottom-layer fore shaft ring beam block 111 and a top-layer fore shaft ring beam block 121; in a construction site, after the open cut structure of the vertical shaft is constructed, after the excavation of the locking foundation pit is completed, a plurality of bottom layer locking ring beam blocks 111 are adopted to splice and form a bottom layer locking ring beam 11, and then a plurality of steel pipe fittings 21 of a greenhouse 2 penetrate through the bottom layer locking ring beam 11 and are driven into the ground; then, the top layer fore shaft ring beam 12 is spliced and formed by a plurality of top layer fore shaft ring beam blocks 121 on the upper surface of the bottom layer fore shaft ring beam 11. So, when the construction forms the fore shaft collar beam part 1, need not on-the-spot formwork erection, ligature reinforcing bar, pour and maintenance concrete, the work progress of fore shaft collar beam part 1 is simple, simple operation just can accomplish fast, improves the efficiency of construction.

The locking collar beam part 1 is of a prefabricated structure, and is prefabricated in a factory in advance to ensure the construction quality of the reinforced concrete structure; the rigidity of the support of the greenhouse 2 is high, the support effect is good, and the influence of the placement of heavy objects on the periphery of the construction site on the foundation pit is small. The steel pipe 21 can be grouted, and the grouted slurry can be used for grouting a new city after solidification, so as to strengthen the stratum, thereby providing the prefabricated reinforced concrete permanent structural member. The upper end of each steel pipe fitting 21 is connected with the bottom fore shaft collar beam 11, the lower end of each steel pipe fitting 21 can extend into the stratum, the top fore shaft collar beam 12 is overlapped on the bottom fore shaft collar beam 11, so that the top fore shaft collar beam 12 provides pre-pressing counter force for the end part of the greenhouse 2, the top fore shaft collar beam 12, the bottom fore shaft collar beam 11, the two layers of fore shaft collar beams, the greenhouse 2 and grouting body form an integral rigid stress system, the integral stability and bearing capacity of the vertical shaft fore shaft collar beam and greenhouse combined support structure are greatly improved, safety of underground excavation of the vertical shaft construction and operation period is guaranteed, and the vertical shaft fore shaft collar beam and greenhouse combined support structure can be used for design and construction of the fore shaft collar beam at the bright-dark boundary of a vertical shaft structure in poor geology.

Referring to fig. 2-6 and 11, in order to ensure the stability and bearing capacity of the top-layer fore shaft collar beam 12 and thus the stability and bearing capacity of the fore shaft collar beam portion 1, each top-layer fore shaft collar beam block 121 is provided with a second bolt hand hole 1211, and after two adjacent top-layer fore shaft collar beam blocks 121 are spliced in place, the second connecting piece 1212 passes through the two second bolt hand holes 1211 which are mutually communicated to fixedly connect the two adjacent top-layer fore shaft collar beam blocks 121. So arranged, the positional relationship between the two adjacent top-layer fore shaft ring beam blocks 121 is ensured to be stable.

Optionally, in this embodiment, the second connector 1212 includes a bent bolt and nut. I.e. two adjacent top-layer locking collar beam blocks 121 are fixedly connected by bolts.

Specifically, referring to fig. 2 and 3, in this embodiment, the top-layer fore shaft collar tie block 121 includes two structures, and for convenience of description, the top-layer fore shaft collar tie blocks 121 of the two structures are respectively referred to as a first top-layer fore shaft collar tie block 1214 and a second top-layer fore shaft collar tie block 1213, and the first top-layer fore shaft collar tie block 1214 has a rectangular parallelepiped shape and is used for splicing two long sides of the top-layer fore shaft collar tie 12; the second top-level fore shaft collar beam block 1213 is an "L" shaped block for splicing to the corners of the top-level fore shaft collar beam 12 and directly forming the two short sides of the top-level fore shaft collar beam 12.

Specifically, referring to fig. 3-6 and fig. 10, in order to ensure the stability and bearing capacity of the bottom layer notch ring beam 11 and further ensure the stability and bearing capacity of the notch ring beam portion 1, in this embodiment, each bottom layer notch ring beam block 111 is provided with a first bolt hand hole 1111, and after two adjacent bottom layer notch ring beam blocks 111 are spliced in place, a first connecting piece 1112 passes through the two first bolt hand holes 1111 that are mutually communicated to fixedly connect the two adjacent bottom layer notch ring beam blocks 111. So set up, guarantee that the positional relationship between two adjacent bottom fore shaft collar tie blocks 111 is stable.

Adjacent two bottom layer lock collar beam blocks 111 are fixedly connected by a first connector 1112. Alternatively, in this embodiment, the first connecting piece 1112 includes a bent bolt and a nut, that is, two adjacent bottom layer collar beam blocks 111 are fixedly connected by a bolt. .

Specifically, referring to fig. 15, in the present embodiment, the bottom layer locking collar beam block 111 has three structures, and for convenience of description, the bottom layer locking collar beam blocks 111 of the three structures are respectively referred to as a first bottom layer locking collar beam block 1115, a second bottom layer locking collar beam block 1116 and a third bottom layer locking collar beam block 1113; the first bottom layer fore shaft ring beam block 1115 is a cuboid block and is used for splicing to form the long side of the bottom layer fore shaft ring beam 11; the second bottom layer fore shaft ring beam block 1116 is a cuboid block and is used for splicing short sides of the bottom layer fore shaft ring beam 11; the third bottom layer fore shaft circle beam block 1113 is "L" type block, and four bights of bottom layer fore shaft circle beam 11 all are provided with a third bottom layer fore shaft circle beam block 1113.

Preferably, in this embodiment, the first bottom layer locking collar beam block 1115, the second bottom layer locking collar beam block 1116 and the third bottom layer locking collar beam block 1113 are provided with steel pipe guiding holes 1117 for guiding and installing the steel pipe 21.

Further preferably, referring to fig. 3, 4, 6 and 9, in this embodiment, the bottom layer locking collar beam block 111 and the top layer locking collar beam block 121 that are adjacent to each other are fixedly connected. By the arrangement, the stability and the bearing capacity of the fore shaft ring beam part 1 can be further ensured.

Specifically, the bottom layer locking collar beam block 111 positioned at the lower layer is provided with a third bolt hand hole 1114, the top layer locking collar beam block 121 positioned at the upper layer is provided with a fourth bolt hand hole 1215, and the third bolt hand hole 1114 and the fourth bolt hand hole 1215 are arranged in a one-to-one correspondence. The third connecting piece 3 passes through the third bolt hand hole 1114 and the fourth bolt hand hole 1215, and fixedly connects the adjacent bottom-layer fore shaft ring beam block 111 and top-layer fore shaft ring beam block 121, so as to ensure the structural stability of the fore shaft ring beam part 1.

Alternatively, referring to fig. 9, in the present embodiment, the third connecting member 3 includes a bent bolt and a nut. The adjacent bottom-layer fore shaft ring beam block 111 and the top-layer fore shaft ring beam block 121 are fixedly connected through the third connecting piece 3, namely, through bolts.

The first connecting piece 1112, the second connecting piece 1212 and the third connecting piece 3 have the same structure, so that the construction progress is facilitated to be improved. Specifically, bent bolts and nuts are commercially available.

The arrangement of the first connecting piece 1112, the second connecting piece 1212 and the third connecting piece 3 can ensure the stability and the bearing capacity of the fore shaft ring beam part 1, so that the fore shaft ring beam part 1 can adapt to the light-dark boundary of the structure in poor geology.

Specifically, referring to fig. 6 and 9, a water blocking hole is provided between the bottom layer locking collar beam block 111 and the top layer locking collar beam block 121, which are adjacent up and down, and a water blocking material 4 is provided in the water blocking hole.

Specifically, in this embodiment, the bottom-layer locking collar beam block 111 and the top-layer locking collar beam block 121 are both provided with water blocking holes, and the two water blocking holes are mutually communicated to form a large water blocking hole, and the water blocking hole is filled with the water blocking material 4.

Specifically, referring to fig. 12 to 14, the steel pipe member 21 includes a steel pipe body 211, a slip casting nozzle 212, and a bit 213.

The upper end of the steel pipe body 211 is connected to the bottom locking collar beam 11, the lower end of the steel pipe body 211 can extend into the stratum, and grouting holes 2111 are formed in the side wall of the steel pipe body 211.

It is understood that the steel pipe body 211 has a hollow structure.

The grouting nozzle 212 is provided at an upper end opening of the steel pipe body 211.

The cone 213 is disposed at the lower end of the steel pipe body 211.

Alternatively, in the present embodiment, the wall thickness of the steel pipe body 211 is at least 8mm; alternatively, the diameter of the steel pipe body 211 is 80mm-160mm, such as 89mm, 108mm, 127mm or 159mm.

The conical head 213 arranged at the lower end of the steel pipe body 211 is convenient for the steel pipe body 211 to be quickly driven into the stratum. After the steel pipe body 211 is driven into the stratum for a preset length, a grouting nozzle 212 is installed at the upper end of the steel pipe body 211, grouting is performed in a mode of interval jump holes (namely, two adjacent steel pipe bodies 211 are not used for grouting), and therefore grouting occurrence during grouting of the two adjacent steel pipe bodies 211 is avoided.

When grouting into the steel pipe body 211, the injected slurry can overflow through the grouting holes 2111 of the side wall of the steel pipe body 211, and the position stability of the steel pipe body 211 in the bottom layer is ensured.

Specifically, the grouting slurry may be selected as a cement slurry. When the groundwater is developed or the slurry diffusion range is larger, the grouting slurry can be changed into cement-water glass double-liquid slurry.

Specifically, the length of the steel pipe 21 may be set as required; when the length of the steel pipe fitting 21 does not meet the design requirement, the two steel pipe bodies 211 can be connected together by adopting the screw thread 5, and the grouting nozzle 212 is positioned at the upper end opening of the uppermost steel pipe body 211; the taper head 213 is provided at the lower end of the lowermost steel pipe body 211.

Further, in the present embodiment, the steel pipe 21 further includes a reinforcement cage 214, and the reinforcement cage 214 is disposed in the steel pipe body 211. The reinforcement cage 214 can improve the bending strength of the steel pipe 21.

The reinforcement cage 214 is provided with a fixing ring 215, and each main rib of the reinforcement cage 214 is connected with the fixing ring 215. Specifically, in this embodiment, the reinforcement cage 214 includes four main ribs, which are disposed at equal intervals along the circumferential direction of the fixing ring 215, and each main rib is welded to the outer side surface of the fixing ring 215. Preferably, a plurality of fixing rings 215 are provided at intervals along the extension direction of the reinforcement cage 214.

Specifically, after grouting, the slurry is solidified to form a grouting body.

In this embodiment, the collar beam part 1 is of a prefabricated structure, so as to accelerate the construction progress. The first connecting piece 1112, the second connecting piece 1212 and the third connecting piece 3 are convenient to install, and the overall stability of the locking collar beam part 1 is ensured. A water blocking hole is arranged between the upper and lower adjacent bottom layer fore shaft ring beam blocks 111 and the top layer fore shaft ring beam blocks 121, and a water blocking material 4 is arranged in the water blocking hole to ensure effective water prevention between the bottom layer fore shaft ring beam 11 and the top layer fore shaft ring beam 12. The rigidity of the greenhouse 2 is high, the supporting effect is good, and the influence of the placement of heavy objects around the construction site on the foundation pit is small; the steel pipe fitting 21 of big-arch shelter portion 2 consolidates the stratum through the slip casting, top layer fore shaft collar tie beam 12 provides the pre-compaction counter-force to the tip of the steel pipe fitting 21 of big-arch shelter portion 2, makes top layer fore shaft collar tie beam 12, the two-layer fore shaft collar tie beam of bottom fore shaft collar tie beam 11 and big-arch shelter portion 2 and slip casting form an integral rigidity atress system, and like "pile foundation joist" structure, greatly improved fore shaft collar tie beam portion 1's overall stability and bearing capacity, ensured the safety of underground excavation shaft construction and operation period.

Example two

Referring to fig. 16, the present embodiment provides a method for constructing a combined support structure of a shaft collar beam and a greenhouse, which is used for constructing the combined support structure of the shaft collar beam and the greenhouse in the first embodiment.

Specifically, the construction method of the shaft locking collar beam and big pipe shed combined support structure comprises the following steps:

s1, prefabricating a bottom layer locking collar beam block 111 and a top layer locking collar beam block 121, wherein a plurality of steel pipe guide holes 1117 are reserved on the bottom layer locking collar beam block 111;

s2, in a construction site, assembling a plurality of bottom layer fore shaft ring beam blocks 111 to form a bottom layer fore shaft ring beam 11;

s3, the steel pipe fitting 21 is driven into the stratum downwards through the steel pipe fitting guide holes 1117 to a set length until each steel pipe fitting guide hole 1117 is driven into one steel pipe fitting 21;

s4, grouting into the steel pipe 21 in a mode of interval hole jumping;

s5, assembling a plurality of top-layer fore shaft ring beam blocks 121 on the bottom-layer fore shaft ring beam 11 to form a top-layer fore shaft ring beam 12.

In the construction method of the shaft locking collar beam and big pipe shed combined support structure provided by the embodiment, the bottom locking collar beam block 111 and the top locking collar beam block 121 are prefabricated, and a plurality of steel pipe guiding holes 1117 are reserved on the bottom locking collar beam block 111; then, in a construction site, assembling a plurality of bottom layer fore shaft ring beam blocks 111 to form a bottom layer fore shaft ring beam 11; then, the steel pipe fitting 21 is punched downwards to a set length through the steel pipe fitting guide holes 1117 until each steel pipe fitting guide hole 1117 is internally punched with one steel pipe fitting 21; further, grouting is carried out in the steel pipe fitting 21 in a mode of interval hole jumping, so that the position stability of the steel pipe fitting 21 in the stratum is ensured; finally, a plurality of top-layer fore shaft ring beam blocks 121 are assembled on the bottom-layer fore shaft ring beam 11 to form a top-layer fore shaft ring beam 12. So, when the construction forms the fore shaft collar beam part 1, need not on-the-spot formwork erection, ligature reinforcing bar, pour and maintenance concrete, the work progress of fore shaft collar beam part 1 is simple, simple operation just can accomplish fast, improves the efficiency of construction.

Specifically, in step S1, the bottom layer and top layer fore shaft collar blocks 111 and 121 are prefabricated according to hydrogeology and structural design. Further specifically, according to engineering geology, hydrogeology, structural design, site profile and transportation conditions, the bottom-layer fore shaft collar beam 11 and the top-layer fore shaft collar beam 12 are reasonably segmented, so that the bottom-layer fore shaft collar beam 11 and the top-layer fore shaft collar beam 12 are assembled in a staggered manner, the size and arrangement space of the steel pipe fitting guide holes 1117 are reasonably designed according to the adopted greenhouse 2, and the prefabricated forming is performed.

Specifically, the steel pipe guide hole 1117 has a guide pipe embedded therein.

It will be appreciated that the second bolt hand hole 1211 and the fourth bolt hand hole 1215 of the top-level locking collar tie block 121 are integrally formed with the top-level locking collar tie block 121.

The first bolt hand hole 1111 and the third bolt hand hole 1114 on the bottom layer fore shaft ring beam block 111 are integrally formed with the bottom layer fore shaft ring beam block 111.

Specifically, in the present embodiment, before step S2, the following operations are also required:

and (5) excavating a foundation pit.

Specifically, before the foundation pit is excavated, the construction of the vertical shaft open cut structure is completed.

Specifically, when a foundation pit is excavated, a slope is laid with a proper gradient, the foundation pit is mechanically excavated to the designed elevation of the bottom surface of the bottom-layer fore shaft ring beam 11, and then a flat field is formed; further, the temporary slope may be appropriately reinforced according to the actual situation, and a concrete cushion layer 6 may be laid in the area of the pit bottom locking collar beam portion 1.

Specifically, in step S2, a plurality of bottom layer locking collar beam blocks 111 are assembled on the concrete cushion layer 6 to form a bottom layer locking collar beam 11; after the assembly is completed, all the first connection members 1112 are installed one by one. The water shutoff holes of the bottom layer locking collar beam blocks 111 are filled with water shutoff materials 4. So far, the bottom layer fore shaft collar beam 11 is assembled. Then, the concrete is backfilled between the bottom layer fore shaft collar beam 11 and the temporary slope to the top surface elevation of the bottom layer fore shaft collar beam 11.

Specifically, step S3 includes the steps of:

the drilling machine is erected, and the steel pipe fitting 21 is driven into the stratum to a set length through the steel pipe fitting guide holes 1117 until one steel pipe fitting 21 is driven into each steel pipe fitting guide hole 1117.

Specifically, in step S4, after the steel pipe 21 is beaten to a preset length, the grouting nozzle 212 is installed, and grouting is performed by adopting a mode of interval hole jump (i.e., any two adjacent steel pipe bodies 211, one of which is not grouting), so as to avoid grouting occurrence when the two adjacent steel pipe bodies 211 are grouting uniformly.

Specifically, in step S5, in the process of assembling the plurality of top-layer notch ring beam blocks 121 on the bottom-layer notch ring beam 11 to form the top-layer notch ring beam 12, after the two adjacent top-layer notch ring beam blocks 121 are spliced in place, the second connecting piece 1212 passes through the two mutually-communicated second bolt hand holes 1211 to fixedly connect the two adjacent top-layer notch ring beam blocks 121. Meanwhile, the water blocking material 4 is filled in the water blocking holes of the top-layer fore shaft ring beam block 121, so that the joint is effectively waterproof.

Further, in step S5, after the top-layer locking collar tie 12 is assembled, two adjacent bottom-layer locking collar tie blocks 111 and top-layer locking collar tie blocks 121 are fixedly connected by bolts. Specifically, the third connecting piece 3 is adopted to pass through the third bolt hand hole 1114 and the fourth bolt hand hole 1215, so that the two bottom-layer fore shaft ring beam blocks 111 and the top-layer fore shaft ring beam block 121 which are adjacent up and down are fixedly connected, and the structural stability of the fore shaft ring beam part 1 is ensured.

After the two adjacent bottom-layer fore shaft ring beam blocks 111 and the top-layer fore shaft ring beam block 121 are fixedly connected, the fore shaft ring beam part 1 is constructed and molded. Finally, backfilling concrete between the fore shaft collar beam part 1 and the temporary side slope to the top surface elevation of the top layer fore shaft collar beam 12.

The backfilled concrete between the locked loop beam portion 1 and the temporary side slope forms a backfill portion 7.

Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims (10)

1. The utility model provides a shaft fore shaft collar tie beam and big-arch shelter joint support structure which characterized in that includes:

the fore shaft circle beam part (1) comprises a bottom layer fore shaft circle beam (11) and a top layer fore shaft circle beam (12), wherein the bottom layer fore shaft circle beam (11) is a frame structure formed by splicing a plurality of bottom layer fore shaft circle beam blocks (111), the top layer fore shaft circle beam (12) is overlapped on the bottom layer fore shaft circle beam (11), and the top layer fore shaft circle beam (12) is a frame structure formed by splicing a plurality of top layer fore shaft circle beam blocks (121);

big-arch shelter portion (2), including a plurality of steel pipe fitting (21), every the upper end of steel pipe fitting (21) with bottom fore shaft collar roof beam (11) are connected, every the lower extreme of steel pipe fitting (21) can extend to in the stratum, a plurality of steel pipe fitting (21) are followed the circumference interval setting of bottom fore shaft collar roof beam (11), grouting can be carried out in steel pipe fitting (21).

2. The shaft locking collar beam and large pipe shed combined support structure according to claim 1, wherein each bottom locking collar beam block (111) is provided with a first bolt hand hole (1111), and after two adjacent bottom locking collar beam blocks (111) are spliced in place, a first connecting piece (1112) passes through the two mutually communicated first bolt hand holes (1111) to fixedly connect the two adjacent bottom locking collar beam blocks (111).

3. The shaft locking collar beam and large pipe shed combined support structure according to claim 1, wherein each top layer locking collar beam block (121) is provided with a second bolt hand hole (1211), and after two adjacent top layer locking collar beam blocks (121) are spliced in place, a second connecting piece (1212) penetrates through the two second bolt hand holes (1211) which are mutually communicated to fixedly connect the two adjacent top layer locking collar beam blocks (121).

4. The shaft locking collar beam and greenhouse combined support structure according to claim 1, wherein adjacent bottom locking collar beam blocks (111) and top locking collar beam blocks (121) are fixedly connected through bolts.

5. The shaft locking collar beam and big pipe shed combined support structure according to claim 1, characterized in that water blocking holes are arranged between the bottom layer locking collar beam blocks (111) and the top layer locking collar beam blocks (121) which are adjacent up and down, and water blocking materials (4) are arranged in the water blocking holes.

6. Shaft collar beam and greenhouse combined support structure according to any one of claims 1-5, characterized in that the steel pipe (21) comprises:

the steel pipe body (211), the upper end of the steel pipe body (211) is connected to the bottom layer locking collar beam (11), the lower end of the steel pipe body (211) can extend into a stratum, and grouting holes (2111) are formed in the side wall of the steel pipe body (211);

a grouting nozzle (212) provided in an upper end opening of the steel pipe body (211);

and a conical head (213) provided at the lower end of the steel pipe body (211).

7. The shaft collar beam and greenhouse combined support structure according to claim 6, wherein the steel pipe (21) further comprises a reinforcement cage (214), and the reinforcement cage (214) is arranged in the steel pipe body (211).

8. The shaft locking collar beam and pipe shed combined support structure according to claim 7, wherein a fixing ring (215) is arranged on the reinforcement cage (214), and each main rib of the reinforcement cage (214) is connected with the fixing ring (215).

9. A method for constructing a shaft locking collar beam and greenhouse combined support structure, which is characterized by being used for constructing the shaft locking collar beam and greenhouse combined support structure according to any one of claims 1-8, and comprising the following steps:

s1, prefabricating a bottom layer locking notch ring beam block (111) and a top layer locking notch ring beam block (121), wherein a plurality of steel pipe guide holes (1113) are reserved in the bottom layer locking notch ring beam block (111);

s2, assembling a plurality of bottom layer fore shaft ring beam blocks (111) to form a bottom layer fore shaft ring beam (11) on a construction site;

s3, the steel pipe fitting (21) is driven into the stratum downwards through the steel pipe fitting guide holes (1113) to a set length until each steel pipe fitting guide hole (1113) is driven into one steel pipe fitting (21);

s4, grouting into the steel pipe (21) in a mode of interval hole jumping;

s5, assembling a plurality of top-layer fore shaft ring beam blocks (121) on the bottom-layer fore shaft ring beam (11) to form a top-layer fore shaft ring beam (12).

10. The method for constructing a combined support structure of a shaft collar beam and a greenhouse according to claim 9, wherein in the step S5, after the top-layer collar beam (12) is assembled, adjacent bottom-layer collar beam blocks (111) and top-layer collar beam blocks (121) are fixedly connected by bolts.