CN112900494B

CN112900494B - Long-distance pipe jacking construction method for urban underground pipe gallery

Info

Publication number: CN112900494B
Application number: CN202110224106.XA
Authority: CN
Inventors: 孙余好; 吴亚华; 邢鹏飞; 林成青; 周煌
Original assignee: Nuclear Industry Jingxiang Construction Group Co Ltd
Current assignee: Nuclear Industry Jingxiang Construction Group Co Ltd
Priority date: 2021-03-01
Filing date: 2021-03-01
Publication date: 2022-03-11
Anticipated expiration: 2041-03-01
Also published as: CN112900494A

Abstract

The invention belongs to the technical field of urban underground comprehensive pipe galleries, and particularly relates to a long-distance pipe jacking construction method for an urban underground pipe gallery. According to the invention, through reasonably matching the raw material composition of the thixotropic slurry and matching the mode of using the combined stirrer, the thixotropic slurry can be quickly and efficiently stirred, and the outstanding pipe jacking resistance reduction and pipe hole reinforcement functions are exerted in the long-distance pipe jacking construction process, so that the risk of soil mass collapse in the urban underground pipe gallery construction process is greatly reduced. The invention also has the following advantages: the combined stirrer has the advantages of reasonable and effective structure, simple and efficient continuous slurry charging operation, flexible and controllable slurry charging, difficulty in causing the problem of excessive or insufficient slurry in a certain barrel, and high overall stirring production and use efficiency of slurry.

Description

Long-distance pipe jacking construction method for urban underground pipe gallery

Technical Field

The invention belongs to the technical field of urban underground comprehensive pipe galleries, and particularly relates to a long-distance pipe jacking construction method for an urban underground pipe gallery.

Background

City underground pipe gallery refers to underground city pipeline integrated corridor, builds a tunnel space promptly in the city underground, with electric power, communication, various engineering pipelines such as gas, heat supply and plumbing collect in an organic whole, is equipped with special access hole, hoist and mount mouth and monitoring system, implements unified planning, unified design, unified construction and management, in city underground pipe gallery construction process, just needs the push pipe to use construction technique.

The long-distance pipe jacking construction method mainly comprises the following steps: firstly, excavating a working pit; secondly, installing jacking equipment; thirdly, the pipeline is jacked and dug; fourthly, the multi-section pipeline is jacked to the designed length, the construction of the whole long-distance jacking pipe is finally completed, thixotropic slurry is used in the jacking process, the using purpose of the thixotropic slurry is to reduce the resistance of the jacking action of the pipeline, the structure of the pipe hole is more stable, and collapse is prevented.

The whole preparation link of the existing thixotropic slurry mostly has the following two problems to a certain degree: firstly, the formula of the thixotropic slurry is not reasonable enough, and finally, the expression in two aspects of resistance reduction of jacking action and reinforcement of the inner wall of a pipe hole is not outstanding enough; secondly, in the process of preparing the thixotropic slurry by mixing, the thixotropic slurry needs to be kept still by a common mixer after the thixotropic slurry is mixed, and the mixer can not be used for stirring any more, so that the common mixer has the problems of low use efficiency and preparation by stirring and mixing products one by one in a single batch, and the efficiency is relatively low.

Therefore, in view of the above, a new long-distance pipe-jacking construction method is urgently needed to ensure that thixotropic slurry can be used quickly and well, and is used for ensuring the safe and efficient jacking action of the pipeline.

Chinese patent with patent publication No. CN107417229A and publication No. 2017.12.01 discloses thixotropic slurry for pipe jacking construction and a preparation method thereof, and the thixotropic slurry comprises the following raw materials in parts by weight: 200 to 300 parts of bentonite, 10 to 40 parts of citric acid, 20 to 100 parts of aluminum sulfate, 20 to 50 parts of sodium carboxymethylcellulose, 50 to 70 parts of sodium alkyl benzene sulfonate, 1500 to 2000 parts of water and 20 to 50 parts of gypsum.

However, the thixotropic slurry in the invention patent has the problem of poor drag reduction effect between the pipeline and the soil body.

The patent publication No. CN208375571U, Chinese utility model patent with publication No. 2019.01.15, discloses a closed pipe-jacking slurry stirring device, which comprises a stirring cylinder, a slurry outlet pipe, a water inlet pipe and a stirrer, wherein the stirring cylinder is provided with a soil inlet and a slurry outlet which are communicated with the inner space of the stirring cylinder, and the slurry outlet is arranged on the soil inlet; the mud outlet pipe is arranged on the mud outlet; the water inlet pipe extends into the inner space of the stirring drum; the stirrer extends into the inner space of the stirring cylinder and is used for stirring the slurry in the stirring cylinder.

But the pipe jacking slurry stirring device in the utility model has the problem of low overall stirring efficiency.

Disclosure of Invention

The invention provides a long-distance pipe jacking construction method for an urban underground pipe gallery, which can be used for quickly and efficiently stirring thixotropic slurry by reasonably matching raw material compositions of the thixotropic slurry and matching a mode of using a combined stirrer, and can play prominent functions of pipe jacking resistance reduction and pipe hole reinforcement in the long-distance pipe jacking construction process, thereby greatly reducing the risk of soil mass collapse in the urban underground pipe gallery construction process.

The technical scheme adopted by the invention for solving the problems is as follows: the long-distance pipe jacking construction method for the urban underground pipe gallery sequentially comprises the three steps of digging a working pit, installing jacking equipment and jacking a pipeline, wherein thixotropic slurry is injected outside the pipe wall in the jacking step of the pipeline, and the thixotropic slurry comprises bentonite, sodium carboxymethyl cellulose, sodium carbonate, ferric sulfate, gypsum, polyacrylamide and water.

The further preferred technical scheme is as follows: the thixotropic slurry comprises 100-200 parts of bentonite, 5-6 parts of sodium carboxymethylcellulose, 11-12 parts of sodium carbonate, 6-13 parts of ferric sulfate, 25-35 parts of gypsum, 5-15 parts of polyacrylamide and 300-450 parts of water.

The further preferred technical scheme is that the mixing preparation method of the thixotropic slurry sequentially comprises the following steps:

s1, adding bentonite and part of water into the combined stirrer, and stirring to obtain primary slurry;

s2, adding sodium carboxymethylcellulose, sodium carbonate, ferric sulfate, gypsum, polyacrylamide and the rest water into the primary slurry, and stirring to obtain intermediate slurry;

s3, standing the intermediate slurry to obtain a final thixotropic slurry product,

in S1, the stirring speed is 300-350r/min, the stirring time is 1-1.5h, and the stirring temperature is 35-45 ℃; in S2, the stirring speed is 600-900r/min, the stirring time is 2-3h, and the stirring temperature is 60-68 ℃; and in S3, standing for 24-30 h.

The further preferred technical scheme is as follows: the combined stirrer structurally comprises a stirrer main body, a stirrer supporting column and a blanking pipe which are arranged on the stirrer main body, wherein the blanking pipe is arranged below the blanking pipe and used for sequentially filling the intermediate slurry into a slurry barrel, a barrel sliding rail unit is respectively arranged on two sides of the barrel sliding rail unit, a barrel standing plate and a limiting plate for alignment are arranged on one side of the barrel standing plate, the stirrer supporting column is used for aligning the front end side upper part in the advancing direction of the slurry barrel, the limiting plate is arranged on the barrel sliding rail unit and passes through the mode that the slurry barrel is excessively loaded and then clamped with the barrel sliding rail unit so as to limit the barrel elastic base unit of the maximum filling amount in the slurry barrel.

The further preferred technical scheme is as follows: the vertical overlapping height between the limiting plate for alignment and the mud bucket is 5-12 cm; the barrel body sliding rail unit comprises a rectangular rail plate body, two channels which are arranged on the upper surface of the rectangular rail plate body and used for the barrel body elastic base unit to pass through, and a weight limiting clamping groove which is arranged on the upper surface of the rectangular rail plate body, is communicated with the long edges of the channels and the rectangular rail plate body and clamps the barrel body elastic base unit when the mud barrel is excessively filled.

The further preferred technical scheme is as follows: the channel comprises a middle horizontal channel bottom and two inclined channel bottoms inwards arranged from the short sides of the rectangular track plate body.

The further preferred technical scheme is as follows: the barrel body elastic base unit comprises universal wheels, elastic supporting parts, barrel body supporting plates and rotary clamping column parts, wherein the universal wheels are used for rolling in the channels, the elastic supporting parts are inserted into the installation barrel bodies of the universal wheels, the barrel body supporting plates are arranged on the four elastic supporting parts, and the rotary clamping column parts are arranged on the elastic supporting parts and are used for adjusting the maximum allowable filling amount in the mud barrel.

The further preferred technical scheme is as follows: elastic support portion is including setting up staving backup pad lower surface and lower extreme insert support column in the installation barrel, the spiro union setting is in on the support column be used for carrying out the spacing support ring of block on the internal anchor ring of installation barrel, and set up in the installation barrel and with the support column cup joints and is used for upwards jack-up the supporting spring of support ring.

The further preferred technical scheme is as follows: the rotary clamping column part comprises a vertical connecting column arranged on the upper surface of the supporting ring and a weight-limiting clamping transverse plate which is arranged on the vertical connecting column and is used for limiting the mud bucket to slide to the bucket body standing plate in a manner of clamping the weight-limiting clamping groove when the mud bucket is excessively filled.

The further preferred technical scheme is as follows: the weight-limiting clamping transverse plate is located below the weight-limiting clamping groove, and the rotary clamping column part is used for adjusting the initial height of the barrel body supporting plate in a mode of rotating the supporting ring for a plurality of complete circles.

The invention has the following advantages: firstly, the thixotropic slurry has good lubricating and resistance reducing effects on pipe jacking actions when used for long-distance pipe jacking construction, can fully reinforce the pushed pipe wall, ensures that the filling support strength at the pipe wall is sufficient, and is not easy to cause soil body collapse; secondly, the thixotropic slurry mixing preparation method adopting the combined stirrer is simple and efficient, and can be used for continuously preparing multi-barrel thixotropic slurry products; thirdly, the combined stirrer is reasonable and effective in structure, the continuous slurry charging operation is simple and efficient, the slurry charging is flexible and controllable, the problem that the amount of a certain barrel of slurry is too much or too little is not easy to occur, and the integral stirring production and use efficiency of the slurry is high.

Drawings

FIG. 1 is a schematic view of the combined mixer of the present invention.

FIG. 2 is a schematic view of the positions of the empty and resting plates in a top view.

Fig. 3 is a schematic view of the alignment limiting plate of the present invention.

Fig. 4 is a schematic structural view of the tub sliding rail unit in a top view according to the present invention.

FIG. 5 is a schematic diagram of the rolling operation of the caster in the channel of the present invention.

FIG. 6 is a schematic view of the position structure of the elastic base unit of the barrel body in the present invention.

Detailed Description

The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Example (b): as shown in the attached

drawings

1, 2, 3, 4, 5 and 6, the long-distance pipe jacking construction method for the urban underground pipe gallery sequentially comprises three steps of digging a working pit, installing jacking equipment and jacking a pipeline, wherein thixotropic slurry is injected outside the pipe wall in the pipeline jacking step, and the thixotropic slurry comprises bentonite, sodium carboxymethyl cellulose, sodium carbonate, ferric sulfate, gypsum, polyacrylamide and water.

In this embodiment, the bentonite and the water are main raw materials of the thixotropic slurry, and the sodium carboxymethyl cellulose, the sodium carbonate, the ferric sulfate, the gypsum and the polyacrylamide can greatly improve the thixotropy of the slurry, so that the two functions of the pipe jacking drag reduction and the pipe wall protection can be performed efficiently.

The thixotropic slurry comprises 100-200 parts of bentonite, 5-6 parts of sodium carboxymethylcellulose, 11-12 parts of sodium carbonate, 6-13 parts of ferric sulfate, 25-35 parts of gypsum, 5-15 parts of polyacrylamide and 300-450 parts of water.

In this embodiment, the proportion of bentonite can ensure that the two functions of pipe jacking drag reduction and pipe wall protection can be primarily coordinated, and the problem that one of the functions has a weak effect is avoided.

The mixing preparation method of the thixotropic slurry sequentially comprises the following steps:

In this example, the mixing of the thixotropic slurry to produce the thixotropic slurry, not mentioned, was carried out in the manner known in the art to ensure that the final mixing produced a substantially effective thixotropic slurry.

The structure of the combined mixer comprises a mixer main body 1, mixer support columns 2 and a blanking pipe 3 which are arranged on the mixer main body 1, a barrel body sliding track unit 4 which is arranged below the blanking pipe 3 and is used for sequentially filling intermediate mud into a mud barrel a, an empty barrel placing plate 5 and a barrel body standing plate 6 which are respectively arranged at two sides of the barrel body sliding track unit 4, and alignment limiting plates 7 which are arranged on two mixer support columns 2 close to one side of the barrel body standing plate 6 and are used for blocking the upper part of the side surface of the front end of the mud barrel a in the advancing direction, and a barrel elastic base unit 8 which is arranged on the barrel sliding rail unit 4 and is used for limiting the maximum filling amount in the mud barrel a in a mode that the mud barrel a is clamped and fixed with the barrel sliding rail unit 4 after being excessively loaded.

In this embodiment, mixer main part 1 is current single motor rotation stirring formula agitated vessel, four mixer support column 2 supports mixer main part 1, be equipped with the stop valve on the unloading pipe 3, combined mixer is before the use, and all mud bucket an all is put on empty bucket places the board 5, treats after the stirring is accomplished in the mixer main part 1, all mud bucket an loops through unloading pipe 3 below, guarantees combined mixer can stir production in succession, and this is compared and is stood in the agitated vessel in order to obtain the mode of thixotropic mud among the prior art, has the advantage that production efficiency improves greatly.

In addition, the tub sliding rail unit 4 and the alignment-use limit plate 7 are used to ensure that the mud tub a is vertically aligned with the mud tub a, preventing mud from falling outside the tub, and the tub elastic base unit 8 cooperates with the alignment-use limit plate 7, and then have the following purposes: firstly, the problem that a certain mud bucket a has too little charging is avoided, and the production order is ensured; secondly, the problem that excessive charging occurs to one mud barrel a is avoided, and mud is prevented from being spilled out in the transportation process; thirdly, the proper loading capacity of the mud in the mud bucket a is adjusted to meet different use requirements or customer requirements.

The vertical overlapping height between the limiting plate 7 for alignment and the mud bucket a is 5-12 cm; the bucket sliding rail unit 4 includes a rectangular rail plate 401, two grooves 402 provided on the upper surface of the rectangular rail plate 401 and used for the bucket elastic base unit 8 to pass through, and a weight-limiting engaging groove 403 provided on the upper surface of the rectangular rail plate 401 and communicating the grooves 402 with the long sides of the rectangular rail plate 401 and engaging the bucket elastic base unit 8 when the mud bucket a is excessively filled. The channel 402 comprises a middle horizontal channel bottom and two inclined channel bottoms that are formed inward from the short sides of the rectangular track plate 401.

In this embodiment, the empty mud bucket a is placed on the elastic base unit 8 of the barrel body, and then moved on the channel 402 to abut against the limiting plate 7 for alignment, at this time, the discharging pipe 3 is just aligned with the opening of the mud bucket a, so that the loading operation before the mud is placed still can be performed, and the elastic base unit 8 of the barrel body is provided with upward elasticity, so that when the mud in the mud bucket a reaches the preset weight, the height of the mud bucket a is reduced, the vertically overlapped interval of 5-12cm disappears, and at this time, the mud bucket a can pass under the limiting plate 7 for alignment to be transported to the static plate 6 of the barrel body.

In summary, the alignment limiting plate 7 has the effect of aligning and discharging, and the second effect is to ensure that the minimum filling material is filled in the slurry barrel a, the upper edge of the slurry barrel a cannot cross the alignment limiting plate 7 if the minimum filling material is smaller than the minimum filling material, the slurry barrel a cannot discharge to the barrel static plate 6, and the problem that the thixotropic slurry product in the barrel sent to a client is short in weight and two in weight is solved.

The bucket elastic base unit 8 comprises a universal wheel 801 for rolling in the channel 402, an elastic support part 802 inserted in the installation cylinder of the universal wheel 801, bucket support plates 803 arranged on the four elastic support parts 802, and a rotary clamping column part 804 arranged on the elastic support part 802 and used for adjusting the maximum allowable filling amount in the mud bucket a. The elastic support portion 802 comprises a support column 802a arranged on the lower surface of the barrel supporting plate 803 and the lower end of the support column is inserted into the installation barrel, a support ring 802b which is screwed on the support column 802a and used for clamping and limiting on the inner ring surface of the installation barrel, and a support spring 802c which is arranged in the installation barrel, sleeved with the support column 802a and used for jacking up the support ring 802 b. The rotary clamping column part 804 comprises a vertical connecting column 804a arranged on the upper surface of the supporting ring 802b, and a weight-limiting clamping transverse plate 804b arranged on the vertical connecting column 804a and used for limiting the mud bucket a to slide to the bucket body static plate 6 in a manner of clamping the weight-limiting clamping groove 403 when the mud bucket a is excessively filled.

In the present embodiment, the method of using the barrel elastic base unit 8 and the advantages thereof are as follows.

First, be equipped with on staving backup pad 803 and align the rectangular channel of mud bucket a profile for it is peacefully steady to put the sky mud bucket a, this L type structure of vertical connection post 804a, for limit heavily use block diaphragm 804b rotates to limit heavily use block diaphragm 804b vertical alignment limit heavily uses block groove 403, at this moment mud bucket a direction of advance top edge support for alignment limiting plate 7, can carry out the mud unloading operation.

Secondly, when the mud bucket a continuously discharges materials, the height of the mud bucket a continuously decreases, namely the supporting spring 802c is continuously compressed, when the upper edge of the mud bucket a is just lower than the lower edge of the alignment limiting plate 7, thixotropic mud products filled in the bucket can be discharged onto the bucket body static plate 6, for example, the charging amount of the thixotropic mud is 80kg, the thixotropic mud is discharged in sufficient amount, and the discharging pipe 3 can be closed.

Thirdly, when the blanking pipe 3 is accidentally delayed to be closed, the weight in the slurry barrel a is increased, the supporting spring 802c continues to be compressed downwards until the weight-limiting clamping groove 403 is clamped into the weight-limiting clamping groove 403, at this time, the four universal wheels 801 cannot slide out of the channel 402, that is, the product cannot be discharged, at this time, a worker must take out part of the slurry to ensure that subsequent barreled thixotropic slurry products cannot be overfilled and easily overflow, for example, the charging amount of the corresponding thixotropic slurry is 85kg, then the barreled thixotropic slurry products discharged by the combined mixer are allowed and reasonable at 80-85kg, and therefore, the elastic barrel base unit 8 has the function of ensuring that the barreled thixotropic slurry products cannot be overweight and lightens.

Fourthly, if the customer receives an order of thixotropic slurry products in the barrel of 90kg, and the combined mixer with the above structure obviously cannot ensure the operation of discharging slurry products with a small size larger than 90kg, the barrel elastic base unit 8 needs to be adjusted, that is, the rotating and clamping column 804 is rotated for an integral number of turns such as one turn, two turns or three turns, so that the initial height of the supporting column 802a, the barrel supporting plate 803 and the slurry barrel a is raised, so that the upper edge of the slurry barrel a just passes over the lower edge of the alignment limiting plate 7, and the filling amount in the slurry barrel a is about the required standard of 90kg, so that the barrel elastic base unit 8 has the advantage of adjusting the preset standard filling amount in the slurry barrel a.

Fifth, the width of the channel 402 is small, so that the universal wheel 801 cannot rotate after entering the channel, and only can move back and forth, when the filling amount of the weight-limiting clamping transverse plate 804b in the mud bucket a greatly exceeds the preset weight, the supporting spring 802c is greatly compressed and descends to block the reuse engaging groove 403, at this time, the entire barrel elastic base unit 8 cannot be removed from the barrel sliding rail unit 4, and a worker must take out some slurry from the slurry barrel a, so that the slurry filling amount descends to a safety line, the weight-limiting engaging transverse plate 804b and the weight-limiting engaging groove 403 are disengaged, the mud bucket a can normally slide to the bucket body standing plate 6 for subsequent standing procedures, the bucket body elastic base unit 8 has the advantage of avoiding the mud in the mud bucket a from being excessively loaded with mud.

The weight-limiting engaging horizontal plate 804b is located below the weight-limiting engaging groove 403, and the rotary engaging column 804 is used to adjust the initial height of the barrel supporting plate 803 by rotating the supporting ring 802b for a plurality of complete circles.

In this embodiment, when the L-shaped structure of the rotary engaging column 804 is stationary, the L-shaped structure is used to monitor whether the slurry loading in the slurry barrel a is overweight, and after the rotary engaging column 804 rotates for a plurality of complete circles, the initial height of the slurry barrel a can be adjusted, that is, the vertical overlapping height of the slurry barrel a compared with the alignment limiting plate 7 is adjusted, which can set the allowable minimum loading of the slurry barrel a on the premise that the supporting spring 802c is a linear spring, thereby ensuring that the combined mixer has the advantages of flexible and accurate discharging and loading operation.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various modifications can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. These are non-inventive modifications, which are intended to be protected by patent laws within the scope of the claims appended hereto.

Claims

1. The long-distance pipe jacking construction method for the urban underground pipe gallery sequentially comprises the three steps of digging a working pit, installing jacking equipment and jacking a pipeline, wherein thixotropic slurry is injected outside the pipe wall in the pipeline jacking step, and the method is characterized in that: the thixotropic slurry comprises bentonite, sodium carboxymethylcellulose, sodium carbonate, ferric sulfate, gypsum, polyacrylamide and water,

in S1, the stirring speed is 300-350r/min, the stirring time is 1-1.5h, and the stirring temperature is 35-45 ℃; in S2, the stirring speed is 600-900r/min, the stirring time is 2-3h, and the stirring temperature is 60-68 ℃; in S3, the standing time is 24-30h,

the combined stirrer structurally comprises a stirrer main body (1), a stirrer supporting column (2) and a blanking pipe (3) which are arranged on the stirrer main body (1), a barrel sliding track unit (4) which is arranged below the blanking pipe (3) and used for sequentially filling intermediate slurry into a slurry barrel (a), empty barrel placing plates (5) and barrel static placing plates (6) which are arranged on two sides of the barrel sliding track unit (4), two stirring machine supporting columns (2) which are arranged on the side close to the barrel static placing plates (6) and used for aligning a front end side upper part in the advancing direction of the slurry barrel (a) for blocking, and a limiting plate (7) which is arranged on the barrel sliding track unit (4) and used for limiting a barrel with the barrel sliding track unit (4) in a clamping and fixing mode after the slurry barrel (a) is excessively loaded, so as to limit the barrel with the maximum filling amount in the slurry barrel (a) A body elastic base unit (8).

2. The urban underground pipe gallery long-distance pipe jacking construction method according to claim 1, characterized in that: the thixotropic slurry comprises 100-200 parts of bentonite, 5-6 parts of sodium carboxymethylcellulose, 11-12 parts of sodium carbonate, 6-13 parts of ferric sulfate, 25-35 parts of gypsum, 5-15 parts of polyacrylamide and 300-450 parts of water.

3. The urban underground pipe gallery long-distance pipe jacking construction method according to claim 1, characterized in that: the vertical overlapping height between the limiting plate (7) for alignment and the mud bucket (a) is 5-12 cm; the barrel body sliding rail unit (4) comprises a rectangular rail plate body (401), two channels (402) which are arranged on the upper surface of the rectangular rail plate body (401) and used for the barrel body elastic base unit (8) to pass through, and a weight limiting clamping groove (403) which is arranged on the upper surface of the rectangular rail plate body (401) and communicated with the channels (402) and the long edges of the rectangular rail plate body (401) and clamps the barrel body elastic base unit (8) when the mud barrel (a) is excessively filled.

4. The urban underground pipe gallery long-distance pipe jacking construction method according to claim 3, characterized in that: the channel (402) comprises a middle horizontal groove bottom and two inclined groove bottoms which are inwards arranged from the short sides of the rectangular track plate body (401).

5. The urban underground pipe gallery long-distance pipe jacking construction method according to claim 3, characterized in that: the barrel elastic base unit (8) comprises a universal wheel (801) used for rolling in the channel (402), an elastic supporting part (802) inserted in a mounting barrel of the universal wheel (801), barrel supporting plates (803) arranged on the four elastic supporting parts (802), and a rotary clamping column part (804) arranged on the elastic supporting part (802) and used for adjusting the maximum allowable filling amount in the mud barrel (a).

6. The urban underground pipe gallery long-distance pipe jacking construction method according to claim 5, characterized in that: elastic support portion (802) including set up staving backup pad (803) lower surface and lower extreme insert support column (802 a) in the installation barrel, the spiro union setting is in on support column (802 a) and be used for carrying out the spacing support ring of block (802 b) on the interior anchor ring of installation barrel, and set up in the installation barrel and with support column (802 a) cup joint and be used for upwards jack-up support spring (802 c) of support ring (802 b).

7. The urban underground pipe gallery long-distance pipe jacking construction method according to claim 6, characterized in that: the rotary clamping column part (804) comprises a vertical connecting column (804 a) arranged on the upper surface of the supporting ring (802 b), and a weight-limiting clamping transverse plate (804 b) which is arranged on the vertical connecting column (804 a) and is used for limiting the slip of the mud bucket (a) to the bucket body static plate (6) in a manner of clamping the weight-limiting clamping groove (403) when the mud bucket (a) is excessively filled.

8. The urban underground pipe gallery long-distance pipe jacking construction method according to claim 7, characterized in that: the weight-limiting clamping transverse plate (804 b) is located below the weight-limiting clamping groove (403), and the rotary clamping column part (804) is used for adjusting the initial height of the barrel body supporting plate (803) in a mode of rotating the supporting ring (802 b) for a plurality of complete circles.