CN221256773U - Construction structure for half reverse construction method of large-diameter shield tunnel originating well - Google Patents

Abstract

The utility model discloses a construction structure for a semi-reverse construction method of a large-diameter shield tunnel originating well, which comprises the following steps: the ground is connected with a vertical wall; the ring frame beams are formed on the inner side of the ground connection vertical wall, the ring frame beams are arranged at intervals up and down, pouring channels are formed in the ring frame beams, the ring frame beams comprise outer beams and inner beams, the upper surfaces and the lower surfaces of the outer beams respectively protrude out of the upper surfaces and the lower surfaces of the inner beams so as to form exposed positioning surfaces on the inner side of the outer beams, the upper ends of the pouring channels extend to the upper surfaces of the inner beams, and the lower ends of the pouring channels extend to the lower surfaces of the outer beams; the template is clamped between the upper and lower adjacent inner beams, and the outer side surfaces of the upper and lower ends are attached to the positioning surfaces. According to the utility model, after the two ring frame beams arranged at intervals are poured firstly, the side wall is poured between the two ring frame beams, and the bottom of the side wall is always supported by the ring frame beams after being poured, so that the support is stable, the expansion of a construction joint is avoided, and the water leakage risk is reduced; and the lower structure can be poured while the side wall is poured, so that the downward continuous pouring of the side wall is not delayed, and the construction efficiency is improved.

Description

Construction structure for half reverse construction method of large-diameter shield tunnel originating well

Technical Field

The utility model relates to the technical field of shield tunneling machine equipment, in particular to a construction structure for a semi-reverse construction method of a large-diameter shield tunnel starting well.

Background

In urban underground tunnel engineering construction, shield tunneling machine construction is a main device and means, and excavation of an originating well is a precondition for the shield tunneling machine to enter underground. The common construction method of the originating well mainly comprises two methods, namely a normal method and a reverse method, wherein the normal method is to excavate a foundation pit to the bottom firstly and then pour a main structure step by step upwards, the method occupies a large amount of ground space, and large deformation is easy to generate when a large foundation pit is constructed in a weak soil body; the reverse construction method is that a top plate of an underground main body structure is firstly poured, the main body structure is excavated downwards step by step under the shielding of the top plate, partial traffic can be opened after the top plate is constructed, only partial space is occupied as a soil outlet and construction site, and the influence on traffic is small.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a construction structure for a semi-reverse construction method of a large-diameter shield tunnel starting well, which can form stable support on a side wall and avoid expansion of a construction joint to leak water.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

A construction structure for a half reverse construction method of a large-diameter shield tunnel initiation well, comprising: the ground is connected with a vertical wall; the ring frame beams are formed on the inner side of the ground connection vertical wall, the ring frame beams are arranged at intervals up and down, pouring channels are formed in the ring frame beams, the ring frame beams comprise outer beams and inner beams, the outer sides of the outer beams are connected with the ground connection vertical wall, the inner sides of the outer beams are connected with the inner beams, the upper surfaces and the lower surfaces of the outer beams respectively protrude out of the upper surfaces and the lower surfaces of the inner beams so as to form exposed positioning surfaces on the inner sides of the outer beams, the upper ends of the pouring channels extend to the upper surfaces of the inner beams, and the lower ends of the pouring channels extend to the lower surfaces of the outer beams; the template is clamped between the upper and lower adjacent inner beams, and the outer side surfaces of the upper and lower ends are respectively attached to the positioning surfaces so as to limit a pouring space for pouring the side walls with the upper and lower adjacent outer beams and the ground connecting vertical wall.

Further, the ring Liang Mairu has an inclined pour tube and the runner is formed in the center of the pour tube.

Further, the upper and lower surfaces of the outer beam are provided with steel plate water stop strips, and the steel plate water stop strips are partially embedded into the pouring space so as to stop water at the construction joint between the side wall and the outer beam.

Further, the ground connection vertical wall is provided with a split bolt which extends inwards and horizontally corresponding to the pouring space, the template is provided with a through hole for the split bolt to pass through, and the inner end of the split bolt passes through the through hole and is connected with a fastening nut.

Further, the outer ends of the split bolts are welded with embedded bars in the ground connection vertical wall.

Further, a pressing cover is clamped between the fastening nut and the template, a steel pipe is clamped between the pressing cover and the template, the steel pipe is arranged on the upper side and the lower side of the split bolt, the pressure cover is provided with a central hole for the split bolt to pass through, and the steel pipe transversely covers a plurality of transversely arranged templates.

Further, the upper surface or the lower surface of the inner beam is provided with an avoidance groove at the inner side of the template.

Further, the adjacent templates are positioned and spliced through a positioning structure.

Further, the positioning structure comprises a positioning strip arranged on one side of the template and a positioning hook part arranged on the other side of the template, and the positioning hook part is provided with a positioning groove for embedding the positioning strip of the adjacent template.

Further, the inner side surface of the template is provided with handrails.

The utility model has the following beneficial effects:

After two ring frame beams which are arranged at intervals can be poured firstly, a side wall is poured between the two ring frame beams, the bottom of the side wall is always provided with a ring frame beam support after the side wall is poured, the support is stable, the expansion of a construction joint is avoided, and the risk of water leakage is reduced; the lower structure can be poured while the side wall is poured, so that the downward continuous pouring of the side wall is not delayed, and the construction efficiency is improved; pouring the pouring space by utilizing an inclined pouring channel extending from the upper surface of the inner beam to the lower surface of the outer beam, so that the pouring of the lower pouring space is not influenced by the outer beam; and the positioning surface is abutted against the template in a fitting way, so that the template is positioned.

In addition to the objects, features and advantages described above, the present utility model has other objects, features and advantages. The present utility model will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is a cross-sectional view of the present utility model;

FIG. 2 is an enlarged view at A of FIG. 1;

FIG. 3 is a schematic view of the structure of the form as it is spliced;

FIG. 4 is a schematic view of the exploded view of FIG. 3;

FIG. 5 is an enlarged schematic view at B of FIG. 4;

FIG. 6 is a schematic diagram of the positioning structure;

fig. 7 is a schematic view of the structure of the originating well after completion of the construction.

Legend description:

The ground connection vertical wall 100;

The steel plate water stop comprises a ring frame beam 200, an outer beam 210, a positioning surface 211, an inner beam 220, a pouring channel 230, a pouring pipe 240, a steel plate water stop 250 and an avoidance groove 260;

Template 300, perforation 310, positioning strip 320, chamfer 321, positioning hook 330, raised strip 331, cross strip 332, hooking strip 333, positioning slot 340, reinforcing rib 350, handrail 360;

Side wall 400, pouring space 401.

Split bolt 500, fastening nut 510, press cap 520, steel pipe 530.

Detailed Description

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Referring to fig. 1 and 2, a construction structure for a half reverse construction method of a large-diameter shield tunnel initiation well in a preferred embodiment of the present utility model includes a ground connection vertical wall 100, a ring frame beam 200, and a template 300.

The ground connection vertical wall 100 is formed by pouring cement, and the section of the ground connection vertical wall is in an annular frame shape. The ring frame beams 200 are formed on the inner side of the ground connection vertical wall 100, the ring frame beams 200 are arranged at intervals up and down, pouring channels 230 are formed in the ring frame beams 200, the ring frame beams 200 comprise outer beams 210 and inner beams 220, the outer sides of the outer beams 210 are connected with the ground connection vertical wall 100, the inner sides of the outer beams 210 are connected with the inner beams 220, the upper surfaces and the lower surfaces of the outer beams 210 respectively protrude out of the upper surfaces and the lower surfaces of the inner beams 220 so as to form exposed positioning surfaces 211 on the inner sides of the outer beams 210, the upper ends of the pouring channels 230 extend to the upper surfaces of the inner beams 220, and the lower ends of the pouring channels 230 extend to the lower surfaces of the outer beams 210, so that pouring openings at the upper ends of the pouring channels 230 are exposed, and the plane where the pouring openings at the upper ends of the pouring channels 230 are located is a horizontal plane, so that pouring is convenient; the form 300 is sandwiched between the upper and lower adjacent inner beams 220, and outer sides of the upper and lower ends of the form 300 are attached to the positioning surfaces 211, so that a casting space 401 for casting the side wall 400 is defined by the two upper and lower adjacent outer beams 210 and the ground connection vertical wall 100. During casting, concrete is poured into the pouring channel 230 to form the side wall 400.

According to the construction structure for the semi-reverse construction method of the large-diameter shield tunnel starting well, provided by the utility model, after the two ring frame beams 200 which are arranged at intervals are poured, the side wall 400 is poured between the two ring frame beams 200, the ring frame beams 200 are always arranged at the bottom after the side wall 400 is poured, the support is stable, the expansion of a construction joint is avoided, and the risk of water leakage is reduced. The prior construction is usually step by step, namely the ring frame beams 200 and the side walls 400 are alternatively downwards and sequentially poured, the lower structure can be poured after the pouring of the upper structure is completed and stabilized, but the utility model can pour the side walls 400 between the two ring frame beams 200 after the pouring of the two ring frame beams 200 is completed, and the lower structure (the ring frame beams 200) can be poured while the side walls 400 are poured, so that the pouring of the side walls 400 is not delayed to be downwards continued, and the construction efficiency is improved; pouring the pouring space 401 with the inclined runner 230 extending from the upper surface of the inner beam 220 to the lower surface of the outer beam 210 so that the outer beam 210 does not affect the pouring of the lower pouring space 401; and the positioning surface 211 is abutted against the template 300 to position the template 300.

Referring to fig. 1, in some embodiments of the present utility model, the ring frame beam 200 is embedded with an inclined pouring tube 240, the pouring channel 230 is formed at the center of the pouring tube 240, and the pouring tube 240 is embedded when the ring frame beam 200 is poured, so that the pouring channel 230 is conveniently formed, and the pouring tube 240 may be a plastic tube, such as a PVC tube, a PPR tube, or a plastic tube made of other materials.

Referring to fig. 1, in some embodiments of the present utility model, steel plate water stop strips 250 are installed on both upper and lower surfaces of an outer beam 210, the steel plate water stop strips 250 are partially embedded in a casting space 401 to stop water at a construction joint between a side wall 400 and the outer beam 210, the steel plate water stop strips 250 prevent water at the construction joint from leaking into an initiation well, the steel plate water stop strips 250 are partially embedded in the outer beam 210 and partially embedded in the side wall 400, thereby stopping water at the construction joint therebetween.

Referring to fig. 1, in some embodiments of the present utility model, a tie bolt 500 extending horizontally inward is provided in a corresponding casting space 401 of a ground connection vertical wall 100, a formwork 300 is provided with a through hole 310 through which the tie bolt 500 passes, and a fastening nut 510 is connected to an inner end of the tie bolt 500 through the through hole 310, so that the formwork 300 is tightly attached to a positioning surface 211 and can resist casting pressure, stable casting is achieved, and the tie bolt 500 is embedded in a side wall 400 after casting, thereby playing a role similar to a reinforcing bar, improving structural strength of the side wall 400, and removing the fastening nut 510 and the formwork 300 after casting is completed.

In a further embodiment of the present utility model, the outer ends of the split bolts 500 are welded with the embedded bars in the ground connecting vertical wall 100, so that the split bolts 500 are connected and fixed, and the side wall 400 is connected with the ground connecting vertical wall 100 more tightly, and the structural strength is higher.

In a further embodiment of the present utility model, a pressing cover 520 is clamped between the fastening nut 510 and the die plate 300, a steel pipe 530 is clamped between the pressing cover 520 and the die plate 300, the steel pipe 530 is arranged at the upper side and the lower side of the split bolt 500, the pressing cover 520 is provided with a central hole for the split bolt 500 to pass through, the steel pipe 530 transversely covers a plurality of die plates 300 which are transversely arranged, the pressing cover 520 and the steel pipe 530 are pressed by screwing the fastening nut 510, so that a plurality of die plates 300 covered by the steel pipe 530 are pressed, the die plates 300 are flush, and casting pressure resistance of the die plates 300 and surface flatness of the side wall 400 are ensured.

Referring to fig. 1, in some embodiments of the present utility model, the upper or lower surface of the inner beam 220 is provided with the escape groove 260 inside the form 300, so that when the form 300 is pulled out, the form 300 may be rotated after being inserted into the escape groove 260, so that the form 300 may be obliquely drawn out, so that the upper and lower surfaces of the form 300 may not be scraped with the inner beam 220, reducing resistance to removal of the form 300.

Referring to fig. 3 and 4, in other embodiments of the present utility model, adjacent formworks 300 are positioned and spliced by a positioning structure, so that positioning between the adjacent formworks 300 is achieved, and leakage of concrete due to dislocation between the formworks 300 is avoided.

Referring to fig. 3 to 5, in a further embodiment of the present utility model, the positioning structure includes a positioning bar 320 provided at one side of the form 300 and a positioning hook 330 provided at the other side of the form 300, the positioning hook 330 being provided with a positioning groove 340 into which the positioning bar 320 of an adjacent form 300 is inserted, so that positioning of the adjacent form 300 is achieved by cooperation of the positioning hook 330 and the positioning bar 320, and it is further understood that, in order not to affect the flatness of the outer side of the form 300, the positioning hook 330 and the positioning bar 320 are both protruded from the inner side of the form 300. In order to facilitate the butt joint, the side edges of the positioning strips 320 are provided with chamfers 321.

Referring to fig. 6, in an embodiment of the present utility model, the positioning hook 330 includes a protrusion 331 connected to the inner side of the form 300 and protruding inward, a cross bar 332 connected to the inner end of the protrusion 331 and extending away from the form 300, and a hook 333 connected to the end of the cross bar 332 facing away from the protrusion 331 and extending outward. The protruding strip 331, the cross strip 332 and the hooking strip 333 are surrounded to form a positioning groove 340. In order to ensure the structural strength of the positioning hook 330, a reinforcing rib 350 is disposed between the protruding strip 331 and the form 300.

Referring to fig. 3, in an embodiment of the present utility model, an armrest 360 is provided on the inner side of the form 300 to facilitate movement or hooking.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The utility model provides a construction structure for half reverse construction method of major diameter shield tunnel originating well which characterized in that includes:

a vertical wall (100) is connected with the ground;

The ring frame beam (200) is formed on the inner side of the ground connection vertical wall (100), the ring frame beams (200) are arranged at intervals up and down, a runner (230) is formed in the ring frame beam (200), the ring frame beam (200) comprises an outer beam (210) and an inner beam (220), the outer side of the outer beam (210) is connected with the ground connection vertical wall (100), the inner side is connected with the inner beam (220), the upper surface and the lower surface of the outer beam (210) respectively protrude out of the upper surface and the lower surface of the inner beam (220) so as to form exposed positioning surfaces (211) on the inner side of the outer beam (210), the upper end of the runner (230) extends to the upper surface of the inner beam (220), and the lower end extends to the lower surface of the outer beam (210); the template (300) is clamped between the upper and lower adjacent inner beams (220), and the outer side surfaces of the upper and lower ends are attached to the positioning surfaces (211) so as to limit a pouring space (401) for pouring the side walls (400) with the upper and lower adjacent outer beams (210) and the ground connecting vertical wall (100).

2. The construction structure for half reverse construction of a large-diameter shield tunnel initiation well according to claim 1, wherein the ring frame beam (200) is embedded with an inclined pouring tube (240), and the pouring channel (230) is formed at the center of the pouring tube (240).

3. The construction structure for half reverse construction method of large-diameter shield tunnel initiation well according to claim 1, wherein steel plate water stop strips (250) are installed on the upper and lower surfaces of the outer beam (210), and the steel plate water stop strips (250) are partially embedded into the casting space (401) to stop water at the construction joint between the side wall (400) and the outer beam (210).

4. The construction structure for half reverse construction method of large-diameter shield tunnel initiation well according to claim 1, wherein the ground connection vertical wall (100) is provided with a split bolt (500) extending horizontally inwards corresponding to the casting space (401), the form (300) is provided with a through hole (310) through which the split bolt (500) passes, and the inner end of the split bolt (500) passes through the through hole (310) and is connected with a fastening nut (510).

5. The construction structure for half reverse construction method of large-diameter shield tunnel initiation well according to claim 4, wherein the outer end of the split bolt (500) is welded with embedded bars in the ground connection vertical wall (100).

6. The construction structure for half reverse construction method of large-diameter shield tunnel initiation well according to claim 4, wherein a pressing cover (520) is clamped between the fastening nut (510) and the template (300), a steel pipe (530) is clamped between the pressing cover (520) and the template (300), the steel pipe (530) is arranged on the upper side and the lower side of the split bolt (500), the pressing cover (520) is provided with a central hole for the split bolt (500) to pass through, and the steel pipe (530) transversely covers a plurality of transversely arranged templates (300).

7. The construction structure for half reverse construction of a large-diameter shield tunnel initiation well according to claim 1, wherein the upper surface or the lower surface of the inner beam (220) is provided with a relief groove (260) inside the form (300).

8. The construction structure for half reverse construction of a large-diameter shield tunnel initiation well according to claim 1, wherein adjacent templates (300) are positioned by positioning structures to achieve positioning splicing.

9. The construction structure for half reverse construction of large-diameter shield tunnel initiation well according to claim 8, wherein the positioning structure comprises a positioning strip (320) provided on one side of the template (300) and a positioning hook portion (330) provided on the other side of the template (300), and the positioning hook portion (330) is provided with a positioning groove (340) into which the positioning strip (320) of the adjacent template (300) is inserted.

10. The construction structure for half reverse construction of large-diameter shield tunnel initiation well according to claim 8, wherein the inner side of the form (300) is provided with a handrail (360).