CN211081874U

CN211081874U - Shield tunneling machine cutter head access hole

Info

Publication number: CN211081874U
Application number: CN201921896185.3U
Authority: CN
Inventors: 徐重之; 杜亚非; 郑永杰; 耿晓亮; 彭嶔; 杜劢; 曾成钢; 梅强
Original assignee: Rail Transit Construction Co Ltd of China Construction Eighth Engineering Division Co Ltd
Current assignee: Rail Transit Construction Co Ltd of China Construction Eighth Engineering Division Co Ltd
Priority date: 2019-11-06
Filing date: 2019-11-06
Publication date: 2020-07-24
Anticipated expiration: 2029-11-06

Abstract

The utility model relates to a shield constructs machine cutterhead access hole, include: the method comprises the following steps of excavating a manhole section which is formed by a soil body and is vertically arranged, wherein the manhole section is positioned in front of the advancing direction of the shield tunneling machine; the positioning protective cylinder is pressed into the access hole section; and pressing the supporting and protecting cylinders into the positioning and protecting cylinders, wherein two adjacent supporting and protecting cylinders are in butt joint connection, and continuously downwards excavating a section of soil body before pressing the corresponding supporting and protecting cylinders, so that access holes are formed in the supporting and protecting cylinders. The utility model discloses an access hole adopts to strut and protects a section of thick bamboo and strut, and it digs one section soil body and sinks one section and strut and protect a section of thick bamboo at the in-process that forms, utilizes the high support of intensity to protect a section of thick bamboo and strut the access hole, can avoid warping at blade disc maintenance in-process, improves the operation safety, and the effectual unstable problem of traditional reinforced concrete structure of having solved has very high practical value and spreading value.

Description

Shield tunneling machine cutter head access hole

Technical Field

The utility model relates to an underground construction engineering field refers in particular to a shield constructs quick-witted blade disc access hole.

Background

As is well known, when a long-distance tunnel of an urban subway is constructed by a shield method, a cutter head of a shield machine is usually overhauled or exchanged after a shield is tunneled for a certain distance, a shield overhaul shaft and a shield overhaul channel are required to be constructed in advance before overhaul under a general condition, and a shield machine overhaul hole is constructed after the shield machine reaches the shield overhaul channel. For the shield machine access hole, the traditional construction method is that the concrete (usually C20 early strength concrete) is added with the mould for the steel bar (usually hoop steel bar + vertical steel bar) after the hole is dug manually (usually), but the access hole that this kind of method was executed is known by practice, the structure is very unstable, in the maintenance process of shield machine cutter head, because shield machine cutter head needs to rotate, the moment of torsion is very big, very easily lead to the access hole to warp, bring very big potential safety hazard for the shield machine maintenance, therefore it is very necessary to develop a more scientific stable structure's shield machine access hole that has enough bearing capacity's non-deformable.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect, a shield constructs quick-witted blade disc manhole is provided, solves current reinforced concrete manhole and extremely easily warp because of the blade disc moment of torsion influence at the blade disc maintenance in-process, and then brings the problem of potential safety hazard for the construction.

The technical scheme for realizing the purpose is as follows:

the utility model provides a shield constructs quick-witted blade disc manhole, include:

the method comprises the following steps of excavating a manhole section which is formed by a soil body and is vertically arranged, wherein the manhole section is positioned in front of the advancing direction of the shield tunneling machine;

the positioning protective cylinder is pressed into the access hole section;

and pressing the supporting and protecting cylinders into the positioning and protecting cylinders, wherein two adjacent supporting and protecting cylinders are in butt joint connection, and continuously downwards excavating a section of soil body before pressing the corresponding supporting and protecting cylinders, so that access holes are formed in the supporting and protecting cylinders.

The utility model discloses an access hole adopts to strut and protects a section of thick bamboo and strut, and it digs one section soil body and sinks one section and strut and protect a section of thick bamboo at the in-process that forms, utilizes the high support of intensity to protect a section of thick bamboo and strut the access hole, can avoid warping at blade disc maintenance in-process, improves the operation safety, and the effectual unstable problem of traditional reinforced concrete structure of having solved has very high practical value and spreading value.

The utility model discloses shield constructs machine cutter head access hole's further improvement lies in, and the support that is located the bottom protects one side opening that a section of thick bamboo corresponds shield and constructs machine cutter head and form the access hole.

The utility model discloses shield constructs machine cutter head access hole's further improvement lies in, the access hole is established in the cross passage that is located the shield constructs the machine top, the inner wall of cross passage is equipped with first branch structure, first branch structure is last to be seted up the breach that corresponds the access hole segment section;

the outer side of the positioning protective cylinder is fixedly connected with a main grid rib in the primary support structure at the breaking opening.

The utility model discloses shield constructs machine cutter head access hole's further improvement lies in, install the thrustor that is located the top of a section of thick bamboo is protected in strutting of top in the cross passage, through thrustor pushes down the corresponding section of thick bamboo that protects of strutting.

The utility model discloses shield constructs machine cutter head access hole's further improvement lies in, the pushing mechanism include the card sleeve in the corresponding strut protect a top push pedal at top and support and lean on in jack in the top push pedal, through the jack pushes down the top push pedal and then pushes down strut protect a section of thick bamboo.

The utility model discloses shield constructs machine cutter head access hole's further improvement lies in, still install hoist mechanism in the cross passage, through hoist mechanism hoist and mount corresponding strut protect a section of thick bamboo extremely in the section of thick bamboo is protected in the location.

The utility model discloses the further improvement of shield structure machine cutter head access hole lies in, it is connected with the multichannel vaulting pole to strut the interior shore of protecting a section of thick bamboo.

The utility model discloses shield constructs machine cutter head access hole's further improvement lies in, and the bottom that the section of thick bamboo was protected in the strutting that is located the bottom is equipped with back cover structure.

The utility model discloses shield constructs machine cutter head access hole's further improvement lies in, back cover structure including the full bed in support and protect a plurality of shaped steel spare of bobbin base portion, the shaped steel spare shore is connected in the inner wall that is located the support of bottom and protects a section of thick bamboo.

The utility model discloses shield constructs machine cutter head access hole's further improvement lies in, the inner wall of strutting the protective cylinder is equipped with the cat ladder, the cat ladder is followed the top of access hole sets up extremely the bottom of access hole.

Drawings

Fig. 1 is the utility model discloses the cross-sectional view after shield constructs the good construction of machine knife dish access hole.

Fig. 2 is the utility model discloses overlook the perspective view after shield constructs machine cutter head access hole construction.

Fig. 3 is the top view of the utility model discloses shield constructs the top view of the drill way department of cutter head access hole.

Fig. 4 is the utility model discloses the structure schematic diagram of handling earthwork in shield constructs quick-witted blade disc access hole work progress.

Fig. 5 is the utility model discloses shield constructs the structure schematic diagram that shield constructs the machine cutter head and overhauls in machine cutter head access hole.

Detailed Description

The invention will be further explained with reference to the drawings and the specific embodiments.

Referring to fig. 1, the utility model provides a shield constructs quick-witted blade disc manhole for solve current reinforced concrete manhole and easily take place to warp and bring the problem of potential safety hazard. The utility model discloses a shield constructs quick-witted blade disc manhole adopts to strut and protects a section of thick bamboo as strutting, should strut and protect a section of thick bamboo and adopt the steel to protect a section of thick bamboo, has sufficient intensity, even can receive great torsional force also can keep stable in structure when the blade disc overhauls, provides the safety guarantee for the construction operation personnel. The utility model discloses an during the manhole construction, earlier utilize the location to protect a section of thick bamboo and fix a position at the manhole top of treating formation, then lie in the location and protect an interior installation of a section of thick bamboo and strut and protect a section of thick bamboo, adopt the limit to dig the limit and impress and strut the mode construction that protects a section of thick bamboo, should strut and protect a mounting accuracy and can guarantee, the utility model discloses a manhole has a great deal of advantages such as economical and practical, convenient operation and safe and reliable. The utility model discloses shield constructs quick-witted blade disc access hole and explains with the attached drawing below.

Referring to fig. 1, the cross-sectional view of the shield machine cutter head access hole after being constructed is shown. Referring to fig. 4, the utility model discloses the structural schematic diagram of handling earthwork in shield constructs quick-witted blade disc access hole work progress is shown. The cutter head access hole of the shield tunneling machine of the present invention is described with reference to fig. 1 and 4.

As shown in fig. 1 and 4, the utility model discloses a shield constructs quick-witted blade disc manhole includes that the manhole segment section, location protect a 22 and a plurality of strut protects a 23, and in the soil body 10 was located to the shield constructs quick-witted blade disc manhole, this shield constructs quick-witted blade disc manhole setting in the place ahead of shield structure machine advancing direction for tunnel shield machine into the position department of this manhole, overhaul the shield structure machine blade disc. Usually, when the tunneling distance of the shield machine is long, a plurality of maintenance positions are set on the tunneling road strength of the shield machine, and a cutter head of the shield machine which is subsequently tunneled to the position is maintained by forming a vertically downward maintenance hole in the soil body 10. The utility model discloses a shield constructs quick-witted blade disc manhole when being under construction, excavate the soil body at the settlement position earlier and form the manhole segment section, also excavate a section of soil body downwards and form the manhole segment section, this manhole segment is located the place ahead of shield structure machine advancing direction, then press in this manhole segment with the location and protect a section of thick bamboo 22, the location protects a section of thick bamboo 22 and locates the top department of the manhole that waits to form, utilize the location to protect a section of thick bamboo 22 and play the positioning action; the supporting protective cylinders 23 are pressed into the positioning protective cylinders 22, the two adjacent supporting protective cylinders 23 are in butt joint, and a section of soil body is continuously excavated downwards before the corresponding supporting protective cylinders 23 are pressed, so that access holes are formed in the plurality of supporting protective cylinders 23. Wherein excavate the soil body and carry out by the mode of manual excavation, and the earthwork adopts the merogenesis excavation, and the corresponding merogenesis of the protective casing of strutting sinks, improves the security of manhole pore-forming.

The supporting protection barrel 23 is utilized to play a supporting role, an access hole is formed inside the supporting protection barrel 23, namely, the supporting protection barrel 23 is internally provided with an overhauling operation space, the rigidity of the supporting protection barrel 23 is utilized to provide a safe and stable operation environment for construction operation personnel, and the overhauling operation safety is guaranteed.

In one embodiment, as shown in fig. 5, the support casing 23 at the bottom opens to form an access opening 231 corresponding to one side of the cutterhead of the shield tunneling machine 31. Preferably, the access hole 231 is formed by cutting off part of the supporting protection barrel 23, and when the access hole 231 is constructed, the size of the access hole 231 is designed to be matched with the size of one spoke on the cutter head, and the maintenance of all cutters on the cutter head can be realized by matching the rotation of the cutter head. And the size of the access hole 231 is designed to be smaller, so that the overall strength of the supporting protection barrel 23 can be prevented from being greatly influenced, and the structural strength and the stability of the supporting protection barrel 23 can be ensured.

In a specific embodiment, as shown in fig. 1 and 2, the utility model discloses a shield constructs machine cutterhead manhole still includes reinforced structure 21, before excavating the soil body and forming the manhole festival section, consolidates the soil body earlier and forms reinforced structure 21. Reinforced structure 21 is consolidated through carrying out the slip casting around to the manhole design position and is formed, and the slip casting direction adopts WSS to retreat formula deep hole slip casting, and reinforced structure 21 locates around the manhole design position, and reinforced structure 21's width is 3 times of manhole internal diameter, and the degree of depth is for being less than manhole bottom design elevation 1 m. The grouting pressure is controlled to be 0.5 MPa-1.0 MPa, the diffusion radius is 0.75m, and the grouting slurry is cement-water glass slurry. Preferably, grouting needs to be completed beyond the distance between the shield tunneling machine and the access hole being more than 50m, and it is guaranteed that grout cannot diffuse into the shield tunneling machine. The strength of the soil body around the manhole to be formed is reinforced by arranging the reinforcement 21, the structural stability of the soil body in the range is also improved, and the stability of the manhole is further improved.

In one embodiment, as shown in fig. 1 and 2, the access holes are provided in a transverse passage 13 located above the shield machine, the transverse passage 13 is provided above the left-line shield tunnel 11 and the right-line shield tunnel 12, and the access holes to be formed are provided in front of the corresponding left-line shield tunnel 11 and the right-line shield tunnel 12. A primary support structure is arranged on the inner wall of the transverse channel 13, and a breaking opening corresponding to the access hole section is formed in the primary support structure; the outer side of the positioning protective cylinder 22 is fixedly connected with a main grid rib in the primary support structure at the breaking opening. Referring to fig. 3, the primary support structure 131 disposed on the inner wall of the transverse channel 13 is a reinforced concrete structure formed by spraying concrete on the main grid ribs 132, when the primary support structure 131 is broken, the concrete on the primary support structure 131 at the position of the manhole is broken, the main grid ribs 132 are cut after the primary support structure is broken, a part of the main grid ribs 132 are left at the periphery of the broken opening during cutting, and when the positioning casing 22 is constructed, the positioning casing 22 and the main grid ribs 132 left at the periphery of the broken opening are welded and fixed, so that the structural stability of the positioning casing 22 is improved.

When the positioning casing 22 is pressed down, the bottom of the positioning casing 22 is abutted against a solid stratum, so that the positioning casing 22 is stably and firmly supported. And the top of the positioning protection cylinder 22 is partially protruded in the transverse passage 13, so that the construction safety in the access hole is effectively protected through the protruded part of the positioning protection cylinder 22, and the danger of falling objects from high altitude caused by falling sundries at the bottom of the transverse passage 13 into the access hole is avoided. Preferably, the height of the portion of positioning sleeve 22 projecting into transverse channel 12 is 20 cm.

Further, as shown in fig. 4, in order to improve the structural stability of the positioning casing 22, a guard ring structure 26 is provided on the outer periphery of the positioning casing 22, and the guard ring structure 26 is fixedly connected to the grid main rib 132 around the periphery of the opening. Further, before the positioning casing 22 is arranged, a plurality of grid main ribs at the breaking opening are connected together by annular reinforcing bars to form a whole. Preferably, the retainer structure 26 is an annular steel plate, which is sleeved on the positioning casing 22 and welded to the positioning casing 22, and then the annular steel plate is placed around the periphery of the breaking opening and connected to the corresponding main grid rib to support and position the positioning casing 22.

In one embodiment, as shown in fig. 4, a pushing mechanism 24 is installed in the transverse passage 13 above the top supporting casing 23, and the corresponding supporting casing 23 is pressed down by the pushing mechanism 24.

When the supporting casing 23 is installed, firstly, one supporting casing 23 is hoisted into the positioning casing 22, and then the top of the supporting casing 23 is pushed by the pushing mechanism so as to press the supporting casing 23 in place. And then, downwards excavating a section of soil body, wherein the supporting casing 23 cannot fall to the bottom of a newly excavated hole due to friction between the supporting casing 23 and the soil body, then hoisting another supporting casing 23, continuously pressing the other supporting casing 23 into the positioning casing 22 through a pushing mechanism, and fixedly connecting the butt joint of the two supporting casings 23, and repeating the steps until the supporting casing 23 at the bottom reaches the designed elevation of the bottom of the manhole.

Further, the pushing mechanism 24 includes a pushing plate 241 which is clamped on the top of the corresponding supporting casing 23 and a jack 242 which abuts against the pushing plate 241, and the pushing plate 241 is pushed down by the jack 242 to push down the supporting casing 23. Preferably, the top pushing plate 241 is an annular plate, an annular clamping groove is formed in the bottom of the annular plate, the annular clamping groove is clamped and sleeved at the top end of the supporting protection cylinder 23, the annular plate is arranged on the top end of the supporting protection cylinder 23, the size of the annular plate is large, a stable top pushing stress surface is provided for the jack 242, the top pushing force of the jack 242 can be uniformly transmitted to the supporting protection cylinder 23, and the supporting protection cylinder 23 is prevented from being pressed and deformed. Preferably, the top pushing plate 241 is a steel plate with a width of 100 mm.

Specifically, a cross beam 27 is supported laterally in the cross passage, the end of the jack 242 is fixed to the cross beam 27, and the cross beam 27 is used to provide a back rest for the jack 242. Preferably, the beam 27 is provided with a plurality of tracks.

Still further, as shown in fig. 4, a lifting mechanism 25 is further installed in the lateral passage 13, and the corresponding support casing 23 is lifted into the positioning casing 22 by the lifting mechanism 25. Preferably, the lifting mechanism 25 includes a hoisting machine 251 disposed in the transverse passage 13, a fixed pulley 252 fixed on the transverse passage 13 and located above the positioning casing 22, and a lifting rope 253 wound on the hoisting machine 251, wherein a hoisting end of the lifting rope 253 bypasses the fixed pulley 252 and can be lowered into the positioning casing 22, and the supporting casing 23 is connected to the supporting casing 23 through the hoisting end, so that the supporting casing 23 can be hoisted to the positioning casing 22. The fixed pulley 252 is fixed to a corresponding cross member 27.

Preferably, the supporting casing 23 has lifting lugs fixed at its two ends, and during hoisting, the hoisting end of the lifting rope 253 is connected to the lifting lugs, so as to hoist the supporting casing 23 in place. When two adjacent supporting casings 23 are in butt joint, the two supporting casings can be fastened and connected by aligning the lifting lugs and then using bolts penetrating through the two lifting lugs.

When the supporting and protecting cylinder 23 is installed, the central deviation of the supporting and protecting cylinder 23 and a pile hole formed by the excavated soil body is ensured to be not more than 2cm, the verticality of the supporting and protecting cylinder 23 is strictly controlled, and the inclination of the supporting and protecting cylinder is not more than 1%. After the supporting casing 23 is installed in place, clay containing water is uniformly backfilled around the supporting casing 23, and the water content of the clay is added according to the required fluidity. The gap between the supporting pile casing 23 and the positioning pile casing 22 is compacted by using clay, and further, when a gap is formed between the supporting pile casing 23 and the inner wall of a pile hole formed by excavated soil body, the clay can be also tightly filled.

The process of installing the supporting protection cylinder 23 specifically comprises the following steps: after the positioning pile casing 22 is installed, a first supporting pile casing is installed, the supporting pile casing is placed into the positioning pile casing by adopting a chain block of 1 ton, then the supporting pile casing is positioned in the positioning pile casing, the earthwork is excavated after positioning, the excavation depth is about 200mm each time, after the earthwork excavation is finished, a jacking mechanism on the supporting pile casing is jacked by adopting a jack of 5 tons to enable the supporting pile casing to sink, after the earthwork is jacked for 200mm, the earthwork is excavated downwards again for 200mm, then the jack continues to jack, the circulation is repeated, before the tail part of the first supporting pile casing enters the positioning pile casing 22, the next supporting pile casing is hoisted, the bottom of the supporting pile casing is connected with the top of the first supporting pile casing by using a bolt, the supporting pile casing on the top is jacked by the jack, at the moment, a push plate is installed on the top end of the supporting pile casing on the top, and the jack is jacked to the push plate, the supporting pile casing, and excavating and pushing in a circulating mode until the designed elevation of the bottom of the manhole is reached.

Still further, the hoisting end of the hoisting rope 253 can be connected with a soil bucket 254, and the soil bucket 254 can be used for hoisting soil formed by excavating earth into the cross passage 13 and then transporting the soil out of the cross passage 13.

In one embodiment, after the supporting casing 23 is installed, a plurality of struts are connected to the inner top of the supporting casing 23, and the struts are used to enhance the structural stability of the supporting casing 23.

In one embodiment, an openable guard rail having a height of 1200mm is installed on the outer circumference of the positioning casing 22 in order to prevent a person from falling into the manual bored pile.

In one embodiment, the bottom of the bottom retaining cylinder 23 is provided with a bottom sealing structure. Utilize the back cover structure to seal the bottom of strutting the protective cylinder 23 for the bottom of manhole is sealed, can be effectual isolated with external soil body, when avoiding external soil body to receive blade disc pivoted disturbance change, and influence the stability of manhole, improves the operation safety.

Preferably, the bottom sealing structure comprises a plurality of steel sections fully laid on the bottom of the supporting casing 23, and the steel section top support is connected to the inside of the supporting casing at the bottom.

In one embodiment, the inner wall of the supporting casing 23 is provided with a ladder that is arranged from the top of the manhole to the bottom of the manhole. The ladder stand can be used for facilitating the personnel to go in and out of the access hole.

Specifically, the utility model discloses a section of thick bamboo 22 is protected in location and is protected a section of thick bamboo 23 to support and adopt the steel of Q235 to protect a section of thick bamboo, wherein the diameter ratio of the section of thick bamboo 22 is protected in location and is strutted the diameter of protecting a section of thick bamboo 23 and big 10 cm. The length of the positioning cylinder is 0.7m, the buried depth is 0.5m, and the wall thickness is 6 mm. The length of the supporting and protecting cylinder 23 is designed to be one fifth of the depth of the access hole, the thickness of the supporting and protecting cylinder is 15mm, and four lifting lugs for lifting are arranged on each section of the supporting and protecting cylinder. The top push plate of the pushing mechanism is provided with a hole corresponding to the lifting lug, so that the hoisting and pushing operations of the supporting protection barrel are not influenced.

The present invention has been described in detail with reference to the embodiments shown in the drawings, and those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details of the embodiments should not be construed as limitations of the invention, which are intended to be covered by the following claims.

Claims

1. The utility model provides a shield constructs quick-witted blade disc manhole which characterized in that includes:

the positioning protective cylinder is pressed into the access hole section;

2. The shield tunneling machine cutterhead access hole of claim 1, wherein the support shield at the bottom forms an access opening corresponding to an opening at one side of the shield tunneling machine cutterhead.

3. The shield tunneling machine cutterhead manhole of claim 1, wherein the manhole is provided in a cross passage above the shield tunneling machine, the inner wall of the cross passage is provided with a primary support structure, and the primary support structure is provided with a breaking opening corresponding to a segment of the manhole;

4. The shield tunneling machine cutterhead manhole of claim 3, wherein a jacking mechanism is installed in the transverse channel above the top supporting casing, and the corresponding supporting casing is pressed down by the jacking mechanism.

5. The shield tunneling machine cutterhead manhole of claim 4, wherein the pushing mechanism includes a pushing plate snap-fitted to the top of the corresponding supporting casing and a jack abutting against the pushing plate, the pushing plate being pressed down by the jack to further press down the supporting casing.

6. The shield tunneling machine cutterhead manhole of claim 3, wherein a lifting mechanism is further installed in the transverse channel, and the corresponding support casing is hoisted into the positioning casing through the lifting mechanism.

7. The shield tunneling machine cutterhead manhole of claim 1 wherein a plurality of struts are connected to the inner top struts of the supporting casing.

8. The shield tunneling machine cutterhead manhole of claim 1 wherein a bottom sealing structure is provided at the bottom of the bottom support casing.

9. The shield tunneling machine cutterhead access hole of claim 8, wherein said bottom-sealing structure includes a plurality of section steel members fully laid on the bottom of said support casing, said section steel members being connected to the inner wall of the support casing at the bottom by means of a top brace.

10. The shield tunneling machine cutterhead manhole of claim 1 wherein the inner wall of the supporting casing is provided with a ladder that runs from the top of the manhole to the bottom of the manhole.