CN221256734U - Push pipe receiving well - Google Patents

Abstract

The application relates to the technical field of pipe jacking construction, in particular to a pipe jacking receiving well, which comprises the following components: a receiving well and a plurality of prefabricated well rings; the device also comprises a plurality of high-pressure jet grouting treatment piles and a connecting pipe port; the high-pressure jet grouting treatment piles are positioned at the bottom of the receiving well and are uniformly distributed along the periphery of the bottom of the receiving well; the prefabricated well rings are positioned in the receiving well and mutually piled up along the axial direction of the receiving well, and the prefabricated well ring positioned at the bottom is positioned on the high-pressure rotary spraying treatment pile; the connection pipe opening is positioned on the side wall of the prefabricated well ring. The application has the advantages of enhancing the stability of the whole structure of the receiving well, reducing the phenomenon that the house structure is damaged due to foundation vibration during construction of the receiving well, and realizing the effect of improving the construction safety.

Description

Push pipe receiving well

Technical Field

The application relates to the technical field of pipe jacking construction, in particular to a pipe jacking receiving well.

Background

The traditional construction method of the existing pipe jacking working well and receiving well comprises the following steps: in the conventional construction method of the two working wells, namely the reverse construction method and the open caisson method, in the construction process of the receiving well, the conventional construction method of the two receiving wells, namely the reverse construction method and the open caisson method, is carried out in a manner of mechanically excavating earthwork. However, the construction of the receiving well which is positioned at the periphery of the dense houses and cannot be predicted on the stability of structures such as the houses is performed, the foundation is easy to vibrate by the traditional construction method of the receiving well, so that the houses are cracked, deformed, collapsed and other structures are damaged, the construction speed of the traditional construction method of the receiving well is low, the quality is safe and uncontrollable during the construction of a muddy soft soil zone, and therefore, a new receiving well is required to be designed aiming at the muddy soft soil.

Disclosure of Invention

In order to strengthen the stability of the whole structure of a receiving well and reduce the phenomenon that a house structure is damaged due to foundation vibration during construction of the receiving well, the application provides a jacking pipe receiving well.

The application provides a pipe jacking receiving well, which adopts the following technical scheme:

A push pipe receiving well comprising: a receiving well and a plurality of prefabricated well rings; the device also comprises a plurality of high-pressure jet grouting treatment piles and a connecting pipe port; the high-pressure jet grouting treatment piles are positioned at the bottom of the receiving well and are uniformly distributed along the periphery of the bottom of the receiving well; the prefabricated well rings are positioned in the receiving well and mutually piled up along the axial direction of the receiving well, and the prefabricated well ring positioned at the bottom is positioned on the high-pressure rotary spraying treatment pile; the connection pipe opening is positioned on the side wall of the prefabricated well ring.

By adopting the technical scheme, the high-pressure jet grouting treatment piles are arranged, so that the substrate of the receiving well is reinforced; the whole structure of the receiving well is reinforced through the prefabricated well ring, so that the stability of the whole structure of the receiving well is further improved; meanwhile, the prefabricated well ring provides a relatively stable construction platform for constructors, so that the constructors can conveniently construct and enter and exit the receiving well, and further, the subsequent pipe jacking access is realized through a pipe connecting port on the prefabricated well ring; therefore, under the reinforcement effect of high-pressure jet grouting treatment pile and prefabricated well ring, the overall structural stability of the receiving well is enhanced, the phenomenon that the house structure is damaged due to foundation vibration during construction of the receiving well is reduced, the improvement of construction safety is realized, the construction convenience is improved through the prefabricated well ring, and the construction efficiency is improved.

Preferably, the device further comprises a plurality of high-pressure jet grouting reinforcement piles, and each high-pressure jet grouting reinforcement pile is symmetrically arranged at two sides outside the receiving well opening in two groups.

Through adopting above-mentioned technical scheme, the setting of stake at the well head is consolidated in high pressure spouting soon to through the support of stake is consolidated in high pressure spouting soon, realize the stability of reverse circulation rig and place, thereby further strengthen the overall structure stability of receiving well, be favorable to further reducing the receiving well and appear because of the impaired phenomenon of foundation vibrations causes the house structure when being under construction, in order to further improve the construction security.

Preferably, the well-killing device also comprises a plurality of water-swelling water stop strips, and each water-swelling water stop strip is positioned between adjacent prefabricated well rings.

By adopting the technical scheme, the expansion water stop strip has good water stop effect, and the setting of the expansion water stop strip improves the seepage prevention performance of the receiving well, so that the phenomenon of water seepage of the receiving well is reduced, and the durability of the receiving well is improved.

Preferably, the device further comprises a riprap siltation layer, wherein the riprap siltation layer is positioned at the bottom of the receiving well.

Through adopting above-mentioned technical scheme, through the crowded silt layer of riprap, further consolidate the structure of receiving well basement to improve receiving well ground bearing capacity, realize receiving well overall structure stability's further improvement, in order to further reduce the phenomenon that the receiving well causes the house structure impaired because of the foundation vibrations when being under construction and appear.

Preferably, the stone polishing device further comprises a cement macadam sealing layer, wherein the cement macadam sealing layer is positioned above the stone polishing and dredging layer.

By adopting the technical scheme, during construction, the bottom of the receiving well is sealed by backfilling cement broken stone, and then the bottom is tamped by plate tamping, so that a cement broken stone bottom sealing layer is formed; under the action of the cement broken stone sealing low layer, the base structure of the receiving well is further enhanced, so that the grounding bearing capacity of the receiving well is further increased; and backfilling cement gravels, so that raw materials are fully utilized, and meanwhile, environmental pollution generated by construction is reduced.

Preferably, the well casing further comprises a cement stone chip backfill layer, and the cement stone chip backfill layer is positioned between the outer wall of the prefabricated well ring and the inner wall of the receiving well.

Through adopting above-mentioned technical scheme, through cement bits backfill layer, strengthen the connection stability between prefabricated well ring and the receiving well to further consolidate the overall structure of receiving well, be favorable to further reducing the phenomenon that the receiving well caused the house structure impaired because of the foundation vibrations when being under construction to appear.

Preferably, the device further comprises a backfill leveling layer, wherein the backfill leveling layer is positioned at the periphery of the top of the receiving well.

By adopting the technical scheme, the periphery of the wellhead of the receiving well can be leveled with the ground through backfilling the leveling layer, so that the road surface evenness is ensured, and the construction safety of constructors is guaranteed.

Preferably, the well cover is arranged at the top of the receiving well and is flush with the backfill leveling layer.

Through adopting above-mentioned technical scheme, after the construction is accomplished, add at the receiving well entrance to a cave department and establish the well lid, through the well lid, provide the shielding effect for the well head to the sustainable use of receiving well is realized in the realization.

In summary, the present application includes at least one of the following beneficial technical effects:

1. Under the reinforcement effect of the high-pressure rotary spraying treatment pile, the prefabricated well ring and the high-pressure rotary spraying reinforcement pile, the overall structural stability of the receiving well is enhanced, the phenomenon that a house structure is damaged due to foundation vibration during construction of the receiving well is reduced, the construction safety is improved, the construction convenience is improved through the prefabricated well ring, and the construction efficiency is improved;

2. The setting of the expansion water stop strip improves the seepage-proofing performance of the receiving well, thereby reducing the occurrence of the phenomenon of water seepage of the receiving well and being beneficial to improving the durability of the receiving well;

3. The stone throwing and silt extruding layer further consolidates the structure of the base of the receiving well, and under the action of the cement broken stone sealing low layer, the base structure of the receiving well is further enhanced, so that the grounding bearing capacity of the receiving well is further increased, the phenomenon that the house structure is damaged due to foundation vibration during construction of the receiving well is further reduced, and the construction safety is further improved; and backfilling cement gravels, so that raw materials are fully utilized, and meanwhile, environmental pollution generated by construction is reduced.

Drawings

FIG. 1 is a plan view of a high pressure jet grouting treatment pile and a high pressure jet grouting reinforcement pile in a pipe-jacking receiving well in an embodiment of the present application;

FIG. 2 is a vertical structural layout of a top-pipe receiving well in an embodiment of the present application taken along line A-A in FIG. 1 (only one high-pressure jet grouting reinforcement pile is shown on each side);

FIG. 3 is a schematic view of a high-pressure jet grouting treatment pile and a high-pressure jet grouting reinforcement pile in the construction process of a pipe-jacking receiving well in an embodiment of the application;

FIG. 4 is a schematic view of steel casing installation, stone throwing and dredging during pipe jacking receiving well construction in an embodiment of the application;

FIG. 5 is a schematic diagram of the installation of a back cover and a prefabricated well ring during the construction of a top receiving well in an embodiment of the application;

Fig. 6 is a schematic drawing showing backfill around a receiving well and extraction of a steel casing in the construction process of a pipe-jacking receiving well in the embodiment of the application.

Reference numerals illustrate: 1. a receiving well; 2. prefabricating a well ring; 3. high-pressure jet grouting treatment piles; 4. a pipe connecting port; 5. high-pressure jet grouting reinforcement piles; 6. a well cover; 7. backfilling the leveling layer; 8. a cement broken stone sealing layer; 9. polishing and squeezing a siltation layer; 10. a cement stone chip backfill layer; 11. a water stop strip; 12. a reverse circulation drilling machine; 13. and (5) a steel casing.

Detailed Description

The application is described in further detail below with reference to fig. 1-6.

The embodiment of the application discloses a pipe jacking receiving well.

Referring to fig. 1 to 3, a pipe jacking receiving well comprises a receiving well 1, a plurality of prefabricated well rings 2, a plurality of high-pressure rotary spraying treatment piles 3 and a pipe connection port 4; the quantity of the high-pressure jet grouting treatment piles 3 can be set according to the requirement, in the embodiment, the quantity of the high-pressure jet grouting treatment piles 3 is four, the four high-pressure jet grouting treatment piles 3 are uniformly distributed along the periphery of the bottom of the receiving well 1, the substrate of the receiving well 1 is reinforced by the high-pressure jet grouting treatment piles 3, and construction safety is guaranteed. The prefabricated well rings 2 are positioned inside the receiving well 1 and are mutually piled up along the axial direction of the receiving well 1, the prefabricated well ring 2 positioned at the bottom is positioned on the high-pressure rotary spraying treatment pile 3, and then the whole structure of the receiving well 1 is reinforced through the prefabricated well ring 2, so that the stability of the whole structure of the receiving well 1 is further improved; the prefabricated well ring 2 also provides a relatively stable construction platform for constructors, so that the constructors can construct and go in and out of the receiving well 1. The pipe connecting port 4 is positioned on the side wall of the prefabricated well ring 2, and the subsequent pipe jacking access is realized through the pipe connecting port 4 on the prefabricated well ring 2.

The high-pressure jet grouting reinforcement piles are symmetrically arranged at two sides outside the opening of the receiving well 1 in two groups; the number of the high-pressure jet grouting reinforcement piles 5 can be set according to the requirement, in the embodiment, twelve high-pressure jet grouting reinforcement piles are preferred, the high-pressure jet grouting reinforcement piles are arranged in two groups of six high-pressure jet grouting reinforcement piles, the two groups of high-pressure jet grouting reinforcement piles are symmetrically arranged on two sides outside the opening of the receiving well 1, the opening of the receiving well 1 is reinforced by arranging the high-pressure jet grouting reinforcement piles 5, and the reverse circulation drilling machine 12 is placed on the high-pressure jet grouting reinforcement piles 5 during construction to prevent sedimentation.

The water-swelling water stop rods 11 are arranged between the adjacent prefabricated well rings 2; the water-swelling water stop strip 11 has good water stop effect, so that the seepage prevention performance of the receiving well 1 is improved, the phenomenon of water seepage of the receiving well 1 is reduced, and the durability of the receiving well 1 is improved.

The device also comprises a riprap silt squeezing layer 9, wherein the riprap silt squeezing layer 9 is positioned at the bottom of the receiving well 1 to prevent sedimentation at the bottom of the receiving well 1.

The cement broken stone sealing layer 8 is positioned above the riprap siltation layer, so that the construction is sanitary and pollution-free.

Still include cement bits back filling layer 10, cement bits back filling layer 10 is located between prefabricated well ring 2 outer wall and the 1 inner wall of receiving well, through cement bits back filling layer 10, strengthens the connection stability between prefabricated well ring 2 and the receiving well 1 to further consolidate the overall structure of receiving well 1, be favorable to further reducing receiving well 1 and cause the impaired phenomenon of building structure to appear because of the foundation vibrations when being under construction.

The device further comprises a backfill leveling layer 7, wherein the backfill leveling layer 7 is positioned on the periphery of the top of the receiving well 1, and the periphery of the well mouth of the receiving well 1 can be leveled with the ground through the backfill leveling layer 7, so that the road surface evenness is ensured, and the construction safety of constructors is guaranteed.

Still include well lid 6, well lid 6 establishes at receiving well 1 top to with backfill leveling layer 7 parallel and level. The base of well lid 6 is prefabricated on prefabricated well ring 2, and prefabricated well ring 2 that prefabricated has well lid 6 base is located receiving well 1 top, adds to establish well lid 6 in receiving well 1 entrance to a cave department after the construction is accomplished, the sustainable use of receiving well 1 of being convenient for.

Referring to fig. 4 to 6, the construction steps of the present embodiment are as follows:

Step 1), cleaning the surrounding sites of the receiving well 1, and breaking pavement concrete at the position of the receiving well 1.

And 2) measuring and lofting, namely performing on-site measurement lofting according to the plane position requirement of the design drawing and the well point pile position numbering chart, determining each pile position, and driving into a small wood pile.

Step 3) constructing a high-pressure jet grouting pile treatment pile 3 and a high-pressure jet grouting reinforcement pile 5, as shown in figure 3;

firstly, constructing high-pressure jet grouting reinforcement piles 5, symmetrically arranging 6 phi 500 high-pressure jet grouting reinforcement piles 5 at holes on two sides of a receiving well 1 respectively, and constructing high-pressure jet grouting treatment piles 3 after the construction of the high-pressure jet grouting reinforcement piles 5 is completed.

The high-pressure jet grouting pile treatment pile 3 and the high-pressure jet grouting reinforcement pile 5 are constructed by taking the following steps: (1) The drilling machine is in place, the main drill rod of the drilling machine is aligned with the hole site, the machine body is measured to be horizontal by a horizontal ruler, the vertical shaft is vertical, and the drilling machine is required to be stably and firmly padded.

(2) Before the drill is started, a water injection test is carried out, so that smoothness of a pipeline is ensured, the water injection pressure after the drill is started is gradually increased, the friction resistance is reduced, and the nozzle is prevented from being blocked.

(3) After the first drill rod drills, water injection is stopped, the pressure is reduced after water injection is stopped, the drill rod is lengthened, water injection and drilling are continued until the pile bottom elevation of the high-pressure jet grouting pile treatment pile 3 and the high-pressure jet grouting reinforcement pile 5 is drilled, the extension times and the total length of the drill rod are recorded in the construction process, and the designed pile length is ensured.

(4) The bore diameter of the drill hole is 20-50 mm larger than the outer diameter of the jet pipe so as to ensure normal slurry returning and slurry overflowing during jet.

(5) And measuring the horizontal direction of the machine body and the vertical direction of the vertical shaft for 1 time by using a horizontal ruler every 5m of drilling so as to ensure that the vertical deviation of drilling is kept within 1 percent.

(6) The stratum change is noticed at any time in the drilling process, and the conditions of hole depth, hole collapse, slurry leakage and the like are recorded in detail.

Drilling holes to the pile bottom elevation of the high-pressure jet grouting pile treatment pile 3 and the high-pressure jet grouting reinforcement pile 5 by a drilling machine, and after the drilling holes are proved to be qualified on site, performing jet grouting on the high-pressure jet grouting pile treatment pile 3 and the high-pressure jet grouting reinforcement pile 5 from bottom to top by adopting a single pipe method, wherein attention is paid to the grouting:

(1) When the grouting pipe is lowered to the designed depth, the nozzle reaches the designed elevation, and grouting can be performed.

(2) And (5) spraying cement slurry meeting the design requirements, and lifting after the slurry returns out of the orifice normally.

(3) When spraying, the grouting pipe is gradually lifted after the preset spraying pressure and the spraying amount are reached. When the middle part is in fault, lifting and rotary spraying should be stopped to prevent the pile body from being interrupted, and meanwhile, the inspection and the fault removal are immediately carried out.

(4) The pressure drop or the sudden increase occurs in the high-pressure injection grouting injection process, and the reasons must be ascertained and timely processed.

(5) When the jet pipe is disassembled in the jet process, falling lap joint repeated jet is carried out, and the lap joint length is not less than 0.1m.

(6) After interruption due to reasons in the spraying process, re-spraying should be carried out when the spraying is resumed, and the lap joint length is not less than 0.5m.

(7) The spraying interruption exceeds the initial setting time of the slurry, the hole sweeping is carried out, and the overlapping length of the repeated spraying is not less than 1m when the spraying is resumed.

(8) And (5) slurry leaks from the holes in the spraying process, lifting is stopped until slurry does not leak, and lifting is continued.

(9) And (3) seriously leaking slurry in the hole in the injection process, stopping injection, and providing an injection pipe to take plugging measures.

(10) In the rotating process, when the first drill rod is lifted out of the ground, grouting is stopped, and after the pressure is reduced, the drill rod is rapidly removed.

After the high-pressure injection grouting of each hole is completed, the cement paste in the hole can quickly generate water precipitation, and the hole should be filled with grouting (i.e. filling recharging) in time until full, and the orifice slurry surface is no longer sunk.

During filling and recharging, attention needs to be paid: (1) The slurry pipe was inserted 2m below the slurry surface in the hole, and the slurry used in the grouting was fed to fill and grout.

(2) Filling and grouting are repeated for a plurality of times, and recharging standards are as follows: until full, the orifice pulp surface no longer subsides.

(3) The recharging time, times, grouting amount, cement consumption and recharging quality should be recorded.

And 4) constructing a backfill leveling layer 7, breaking out the high-pressure jet grouting piles for excavating new and old roads, and constructing the backfill leveling layer 7 after the construction is completed, wherein the elevation of the backfill leveling layer 7 is consistent with the elevation of the ground.

Step 5) as shown in fig. 4, constructing the foundation pit of the receiving well 1, and before construction, firstly, performing the work of leveling the construction site, creating a working platform and the like. The reverse circulation drilling machine 12 is placed on the high-pressure jet grouting reinforcement pile 5, and two 20 channel steels can be paved at the bottom of the reverse circulation drilling machine 12 to ensure the construction stability of the reverse circulation drilling machine 12. Before the construction of the receiving well 1, whether underground barriers and municipal pipelines exist at each open caisson is firstly ascertained, the construction can be carried out after the construction is changed, and the foundation pit of the receiving well 1 is constructed by the following steps:

(1) And (3) measuring, paying off and positioning, setting up a cross pile protector in a range of 50cm larger than the pore-forming radius by taking the center of the receiving well 1 as the center of a circle after the construction lofting pile position is determined, and opening a drill after measuring and rechecking.

(2) The reverse circulation drilling machine 12 is in place, the drilling machine is assembled and debugged, then the drilling machine is moved to a drilling position, the center of the drill bit and the center of the receiving well 1 are positioned on the same straight line when the drilling machine is regulated, a drill rod is plumbed, and meanwhile, the center line of a drill plate and a lifting pulley on a drill frame are positioned on the same plumb line, and the position deviation of the drill rod is not more than 2cm.

(3) Reverse circulation drilling 12 construction, after the drilling machine is in place, the center point of the drill bit is aligned with the center of the receiving well 1, the perpendicularity of the drill rod is adjusted, clean water is injected, bentonite is added into the hole to make slurry, then drilling is carried out, and the working cycle is as follows: hole alignment, drilling by adding a drill rod and drilling. The mud is used for protecting the wall in the drilling process, the mud surface is ensured to be always lower than the bottom of the ground in the drilling machine construction process, the stability of the hole wall is ensured, and the reverse circulation drilling machine 12 drills to the bottom of the receiving well 1 by a distance from the bottom elevation to the next.

Step 6) as shown in fig. 4, installing the full length steel pile casing 13, pumping out slurry, and hanging and installing the full length steel pile casing 13 after drilling construction is completed, and pumping out slurry in the hole. When the steel pile casing 13 is buried, the pile position is determined through lofting the cross pile casing, the center position of the steel pile casing 13 is found, the center of the steel pile casing 13 is overlapped with the intersection point of the cross pile casing, and meanwhile, the steel pile casing 13 is vertical through checking by using a horizontal ruler and a vertical ball, so that the steel pile casing 13 is buried accurately, horizontally, vertically and stably.

Step 7) as shown in fig. 4, a riprap siltation layer 9 is constructed, the riprap siltation layer 9 is arranged at the bottom of the receiving well 1, and the riprap material is block stone stripped from the bottom of a stope. Before the construction of throwing stone, the sheet stone is mined first for strength test, and the sheet stone can be used after reaching the standard and design requirements. The stone is thrown by manual unloading of a trolley, and is thrown and filled by an excavator. Firstly, uniformly polishing the first layer of rubble, rolling by an excavator bucket after the first layer of rubble is finished, and polishing the second layer of rubble after the lump stones sink to be flush with the substrate. And (3) rolling by the same method after the completion, if the stone block has no obvious settlement, extending forward to perform the next construction, and if the settlement of the stone block is still larger, throwing a layer of stone block for rolling until the settlement of the stone block is smaller.

Step 8) as shown in fig. 5, constructing a cement macadam back cover layer 8, setting the cement macadam back cover layer 8 at the bottom of the receiving well 1 for back cover, continuously pumping water and cleaning silt to a designed elevation after the construction of a bottom hole stone throwing and silt squeezing layer 9 is completed, ensuring the construction of a dry working face, then backfilling 20% of cement macadam foundation in layers, and tamping by adopting a flat vibrator.

Step 9) as shown in fig. 5, the prefabricated well ring 2 is installed: (1) The prefabricated well ring 2 is prefabricated by concrete, the base of the well cover 6 is prefabricated in the prefabricated well ring 2, and the prefabricated well ring 2 prefabricated with the base of the well cover 6 is positioned at the top of the receiving well 1.

(2) The inner side of each prefabricated well ring 2 is convex and concave; when the prefabricated well ring 2 is hoisted, a sufficient hoisting operation space is reserved on a construction site, so that the prefabricated well ring 2 component is not damaged, the hoisting angle is required to be larger than 60 degrees during hoisting, and the prefabricated well ring is installed by manually matching with hoisting machinery.

(3) Before the prefabricated well rings 2 are installed, slurry is firstly set at the bottom of the receiving well 1, water-swelling water stop bars 11 are installed between the prefabricated well rings 2, and the elevation of the well cover 6 is the same as that of the road surface.

Step 10) as shown in fig. 6, a cement dust backfill layer 10 is constructed, the cement dust backfill layer 10 is arranged between the wall of the receiving well 1 and the prefabricated well ring 1, and the cement dust backfill layer 10 is compacted by vibrating with a wooden stick.

Step 11) the steel pile casing 13 is pulled out, two hanging rings are welded at the top end of the steel pile casing 13, and after the gap between the wall of the receiving well 1 and the steel pile casing 13 is backfilled tightly, the steel pile casing 13 is pulled out by a crane.

Step 12), installing a well cover 6 on the top of the receiving well 1, wherein the elevation of the well cover 6 is consistent with that of the ground.

The construction process flow comprises the following steps: cleaning the surrounding sites of the receiving well 1, measuring and setting out, constructing a high-pressure jet grouting pile treatment pile 3, constructing a high-pressure jet grouting reinforcement pile 5, constructing a backfill leveling layer 7, constructing a foundation pit of the receiving well 1, installing a steel pile casing 13, pumping out slurry, constructing a stone throwing and dredging layer 9, constructing a cement macadam sealing layer 8, installing a prefabricated well ring 2, constructing a cement stone chip backfill layer 10, extracting the steel pile casing 13 and installing a well cover 6.

The foregoing is illustrative of the present application, and is not meant to limit the scope of the application in any way, therefore: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (8)

1. A push pipe receiving well comprising: a receiving well (1) and a plurality of prefabricated well rings (2); the device is characterized by also comprising a plurality of high-pressure jet grouting piles (3) and pipe connecting ports (4); the high-pressure jet grouting treatment piles (3) are positioned at the bottom of the receiving well (1) and are uniformly distributed along the periphery of the bottom of the receiving well (1); the prefabricated well rings (2) are positioned in the receiving well (1) and are mutually piled up along the axial direction of the receiving well (1), and the prefabricated well rings (2) positioned at the bottom are positioned on the high-pressure jet grouting treatment piles (3); the connecting pipe opening (4) is positioned on the side wall of the prefabricated well ring (2).

2. A pipe-jacking receiving well according to claim 1, further comprising a plurality of high-pressure jet grouting reinforcement piles (5), wherein each high-pressure jet grouting reinforcement pile (5) is symmetrically arranged at two sides outside the opening of the receiving well (1) in two groups.

3. A pipe-jacking receiving well as claimed in claim 1, further comprising a plurality of water-swellable water-stop strips (11), each water-swellable water-stop strip (11) being located between adjacent prefabricated well rings (2).

4. A pipe-jacking receiving well according to claim 1, further comprising a riprap siltation layer (9), said riprap siltation layer (9) being located at the bottom of the receiving well (1).

5. A pipe-jacking receiving well as claimed in claim 4, further comprising a cement rubble back cover layer (8), said cement rubble back cover layer (8) being located above said rubble siltation layer (9).

6. A pipe-jacking receiving well according to claim 1, further comprising a cement dust backfill layer (10), said cement dust backfill layer (10) being located between the outer wall of the prefabricated well ring (2) and the inner wall of the receiving well (1).

7. A pipe-jacking receiving well as claimed in claim 1, further comprising a backfill leveling layer (7), said backfill leveling layer (7) being located at the top periphery of the receiving well (1).

8. A pipe-jacking receiving well as claimed in claim 7, further comprising a well cover (6), said well cover (6) being provided on top of the receiving well (1) and flush with the backfill leveling layer (7).