Receiving construction structure for rectangular pipe jacking machine in enclosure stage
By using an integrated ring frame beam and adjustable support system during the enclosure phase, the problems of prolonged pipe jacking construction and torsional instability of the support system were solved, resulting in a shorter construction period and improved safety.
Patent Information
- Application Number
- CN202520586825.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-03-31
AI Technical Summary
In existing technologies, pipe jacking construction requires waiting for the completion of the main structure of the subway station, which leads to a delay in the construction progress. Furthermore, the foundation pit support system is prone to torsion and instability due to geological inhomogeneity during the retaining stage, posing a safety hazard.
The system adopts an integrated ring frame beam and adjustable support components. The ring frame beam is fixedly connected to the retaining underground continuous wall. The support components are axially adjustable. The system combines servo columns and L-shaped steel bars to enhance torsional resistance. The bottom beam is embedded in the receiving platform to transfer the force. The system combines post-cast ring beams and sloping intercepting ditches to improve stability.
Pipe jacking during the retaining stage reduces construction time, manpower and material resources, improves the stability of the support system, avoids torsional instability accidents, and ensures construction safety.
Smart Images
Figure CN223908220U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a pipe jacking construction technical field especially a structure for receiving construction of rectangular pipe jacking machine in the enclosure stage. BACKGROUND
[0002] The rectangular pipe jacking machine is a large -scale machinery for digging excavation in the soil, and compared with the open cut method tunnel, the advantage of the pipe jacking tunnel lies in that the pipe jacking is less disturbed to the surrounding soil, and the construction speed is faster. Therefore, the pipe jacking machine is widely used in underground engineering. When building the subway station, the structure of the subway station generally adopts the open cut method excavation. The open cut method excavation needs to isolate the site in the construction range, but when the people around the subway station are more intensive, there are many buildings, the subsidiary structure foundation pit cannot adopt the open cut method construction, and it is very suitable to adopt the pipe jacking machine to excavate the subsidiary structure passage.
[0003] However, the pipe jacking construction in the prior art needs to wait for the completion of the main structure construction of the subway station, and then the pipe jacking machine construction is carried out after the support capacity of the main structure of the subway station is enhanced. However, the cycle of the main structure construction of the subway station is long, and the waiting of the pipe jacking machine will seriously delay the construction progress and prolong the construction cycle. Secondly, the complex pipe jacking machine receiving platform needs to be additionally built in the main structure of the subway station to receive the pipe jacking machine, which wastes manpower and material resources.
[0004] Although the pipe jacking machine excavates the subsidiary structure passage in the enclosure stage can greatly shorten the construction cycle, the support system in the foundation pit in the enclosure stage is a temporary support system, and the pipe jacking machine will produce a huge pressure on the enclosure diaphragm wall. Due to the influence of geological heterogeneity, the stress of the enclosure diaphragm wall is very complex, and the support system is prone to torsional instability and other safety accidents.
[0005] Therefore, it is necessary to provide a structure for receiving construction of rectangular pipe jacking machine in the enclosure stage to solve or at least alleviate the above-mentioned defects. UTILITY MODEL CONTENT
[0006] The main purpose of the utility model is to provide a structure for receiving construction of rectangular pipe jacking machine in the enclosure stage to solve the technical problem of torsional instability of the support system caused by geological heterogeneity when the pipe jacking machine is constructed in the enclosure stage in the prior art.
[0007] To achieve the above object, the utility model provides a structure for receiving construction of rectangular jacking pipe machine in the stage of enclosure, the structure is equipped in foundation pit, and the foundation pit includes enclosure diaphragm wall, the structure includes receiving platform and integral ring frame beam, the height of receiving platform matches with the bottom of rectangular jacking pipe machine receiving port, the ring frame beam is fixedly connected with enclosure diaphragm wall, and the ring frame beam includes upper beam, side beam and bottom beam, the top surface of receiving platform is equipped with embedding groove for the fixation of bottom beam, and the height of bottom beam matches with the top surface of receiving platform, still include a plurality of support, the support is axial force adjustable support, and the support is connected with upper beam and side beam respectively.
[0008] Preferably, it further includes a connecting plate fixed to the inner end surface of the ring frame beam, the connecting plate surrounds the support and is fixedly connected with the support.
[0009] Further preferably, the support is a servo cylinder, one end of the servo cylinder is fixedly connected with the connecting plate, and the other end is fixed to the enclosure diaphragm wall.
[0010] Further, the ring frame beam is provided with a constraint hole, and the size of the constraint hole matches the size of the rectangular jacking pipe machine.
[0011] Further, it further includes a post-cast ring beam, the rectangular jacking pipe machine receiving port includes a rectangular jacking pipe, and the post-cast ring beam fills the gap between the ring frame beam and the rectangular jacking pipe.
[0012] Further, it further includes an L-shaped steel bar, the ring frame beam is provided with a ring-shaped steel bar, one end of the L-shaped steel bar is connected with the ring-shaped steel bar, and the other end of the L-shaped steel bar is connected with a main reinforcement in the enclosure diaphragm wall.
[0013] Preferably, the receiving platform is an undug soil platform in the foundation pit, and the side surface of the soil platform along the construction direction of the rectangular jacking pipe machine is connected with the enclosure diaphragm wall; the top surface of the soil platform is further provided with a reinforcing layer, and the surface of the reinforcing layer matches the rectangular jacking pipe machine receiving port.
[0014] Further preferably, the soil platform further includes a slope, and the slope is arranged on the side surface of the soil platform perpendicular to the construction direction of the rectangular jacking pipe machine.
[0015] Further preferably, the slope includes a first slope and a second slope, a buffer platform is arranged between the first slope and the second slope, and the slope of the first slope is lower than that of the second slope.
[0016] Further preferably, the soil platform further includes a plurality of water intercepting ditches, the plurality of water intercepting ditches are arranged on the first slope and the top surface of the soil platform, the first slope and the buffer platform, and the bottom of the second slope, and the plurality of water intercepting ditches are interconnected.
[0017] Compared with the prior art, the utility model has the beneficial effects as follows:
[0018] The support shaft force of the support piece can be adjusted, uneven stress is caused to the enclosure diaphragm wall around the ring frame beam due to geological unevenness in the pipe jacking construction process, technical personnel can balance the uneven stress by flexibly adjusting the support shaft force of the support piece, the integrated ring frame beam has good torsion resistance and mechanical transmission performance, the bottom beam of the ring frame beam is embedded in the receiving platform and can transmit stress to the receiving platform, the stability of the whole support system is improved, pipe jacking construction is realized in the enclosure stage, the construction period is reduced, and manpower and material resources are reduced. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced as follows, obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the structure shown in the drawings without creative labor for those skilled in the art.
[0020] Figure 1 It is an embodiment of the utility model that the cross-sectional view of the receiving platform overall structure at the ring frame beam in the foundation pit is shown;
[0021] Figure 2 It is an embodiment of the utility model that the top view of the receiving platform overall structure in the foundation pit is shown;
[0022] Figure 3 It is an embodiment of the utility model that the L-shaped reinforcing steel bar connection diagram of the ring frame beam and the enclosure diaphragm beam is shown;
[0023] Figure 4 It is an embodiment of the utility model that the internal structure diagram of the rectangular pipe jacking machine receiving port after pipe jacking construction is shown.
[0024] The purpose, functional characteristics and advantages of the utility model will be further explained by combining with the embodiments and referring to the drawings.
[0025] EXPLANATION OF DRAWINGS:
[0026] 1, foundation pit;2, enclosure diaphragm wall;21, main reinforcement;3, receiving platform;31, first slope;32, buffer platform;33, second slope;34, reinforcing layer;4, ring frame beam;41, upper beam;42, side beam;43, bottom beam;44, ring-shaped reinforcing steel bar;5, support piece;6, connecting plate;7, rectangular pipe jacking machine;8, rectangular pipe;9, water intercepting ditch;10, L-shaped reinforcing steel bar;11, post-cast ring beam. DETAILED DESCRIPTION
[0027] It should be understood that the specific embodiments described herein are merely illustrative of the present application and do not limit the present application.
[0028] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.
[0029] It should be noted that all directional indications, such as up, down, left, right, front, back, etc., in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as described in the drawings), and if the certain posture changes, the directional indications also change accordingly.
[0030] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of those skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.
[0031] In the existing subway station construction, due to the dense activities of people around the location of the subway station, there is a great safety risk, so it is generally required to isolate the construction range before the subway station construction, then set the underground retaining diaphragm wall to isolate the soil body around the foundation pit, then dig the foundation pit, and then construct the support system in the foundation pit to reinforce and support the retaining diaphragm wall, which is the retaining stage, and then construct the main structure of the station.
[0032] After the construction of the main structure of the station is completed, the stability of the wall structure is improved, and the construction unit considers safety, so the pipe jacking construction is usually constructed after the construction of the main structure of the station is completed. However, the construction period of the main structure of the station is long, and the long waiting of the pipe jacking construction will seriously delay the construction progress and prolong the construction period. Moreover, the main structure of the station generally does not include a platform for receiving the pipe jacking machine, so an additional pipe jacking machine receiving platform needs to be built in the main structure of the station to receive the pipe jacking machine.
[0033] If the pipe jacking construction is set in the enclosure stage, the bearing capacity of the enclosure diaphragm wall is not enough due to the low stability of the wall of the enclosure diaphragm wall, and a support system needs to be supported. If the support system is not set reasonably, the bearing capacity of the enclosure diaphragm wall is not enough. Moreover, in the construction process, the stress of the enclosure diaphragm wall is complex due to the unevenness of the geology. If the support axial force cannot be adjusted in time, the change of the enclosure diaphragm wall is easy to cause the torsion of the support system, and finally causes the safety problems such as water leakage, cracking and instability of the foundation pit.
[0034] Therefore, in view of the above, please refer to Figures 1 to 4 The embodiment provides a structure for receiving pipe jacking construction in a rectangular pipe jacking machine in an enclosure stage. The structure is arranged in a foundation pit, and the foundation pit comprises an enclosure diaphragm wall. The structure comprises a receiving platform and an integrated ring frame beam. The height of the receiving platform matches the bottom of a rectangular pipe jacking machine receiving port. The ring frame beam is fixedly connected with the enclosure diaphragm wall. The ring frame beam comprises an upper beam, a side beam and a bottom beam. The top surface of the receiving platform is provided with an embedded groove for fixing the bottom beam. The height of the bottom beam matches the top surface of the receiving platform. The structure further comprises a plurality of support members. The support members are axial force adjustable support members. The support members are respectively connected with the upper beam and the side beam. In the embodiment, the integrated ring frame beam has good torsion resistance and mechanical transmission performance. The bottom beam of the ring frame beam is embedded in the receiving platform, so that the stress can be transmitted to the receiving platform, and the stability of the entire support system is improved. The support axial force of the support members is adjustable. In the pipe jacking construction process, due to the unevenness of the geology, the enclosure diaphragm wall around the ring frame beam is subjected to uneven stress. The support axial force of the support members can be adjusted flexibly to balance the uneven stress, so that the pipe jacking construction in the enclosure stage is realized, the construction period is reduced, and the manpower and material resources are reduced.
[0035] In one embodiment, a connecting plate is further included. The connecting plate is fixed to the inner end surface of the ring frame beam. The connecting plate surrounds the support member and is fixedly connected with the support member. The arrangement of the connecting plate can facilitate the fixed connection of the support member with the ring frame beam. When the ring frame beam is subjected to torsion, the support member can effectively constrain the ring frame beam through the connecting plate, further enhancing the torsion resistance of the ring frame beam and improving the stability of the support system.
[0036] Further preferably, the support member is a servo cylinder. One end of the servo cylinder is fixedly connected with the connecting plate, and the other end is fixed to the enclosure diaphragm wall. The adjustment of the support axial force of the servo cylinder can be adjusted by a servo system, which reduces the difficulty of adjusting the support axial force of the servo cylinder, improves the response speed to uneven stress and reduces the risk. Even the servo cylinder can cooperate with the algorithm of the existing geological monitoring system to automatically respond and adjust the support axial force.
[0037] In another embodiment, as preferred, the ring frame beam is provided with a constraint hole, the size of which matches the size of the rectangular pipe jacking machine. The size of the constraint hole is reduced to match the size of the rectangular pipe jacking machine, preventing uneven force on the ring frame beam from causing accidents such as overturning when the rectangular pipe jacking machine is received in the rectangular pipe jacking machine receiving port. Moreover, the gap between the rectangular pipe and the ring frame beam can be reduced, avoiding excessive deviation between the rectangular pipe and the ring frame beam, water leakage, and even cracking.
[0038] Therefore, referring to Figure 4 , as further preferred, in the present embodiment, further comprising a post-poured ring frame beam, the rectangular pipe jacking machine receiving port includes a rectangular pipe, and the post-poured ring frame beam fills the gap between the ring frame beam and the rectangular pipe. The filling effect of the post-poured ring frame beam can make the ring frame beam and the rectangular pipe more closely combined, avoiding excessive deviation between the rectangular pipe and the ring frame beam, water leakage, and even cracking. The post-poured ring frame beam can also provide further support for the pipe, improving the load capacity and safety of the rectangular pipe jacking machine receiving port.
[0039] In one embodiment, as shown in Figure 3 , further comprising an L-shaped steel bar, the ring frame beam is provided with a ring-shaped steel bar, one end of the L-shaped steel bar is connected to the ring-shaped steel bar, and the other end of the L-shaped steel bar is connected to the main reinforcement in the diaphragm wall. One end of the L-shaped steel bar is welded to the main reinforcement of the diaphragm wall, and the other end is welded to the main reinforcement of the temporary ring frame beam. The length of the L-shaped steel bar is 10d (d is the diameter of the steel bar). The L-shaped steel bar connects the ring-shaped steel bar of the ring frame beam and the main reinforcement of the diaphragm wall, further improving the torsional performance of the ring frame beam, avoiding problems such as subsidence of the ring frame beam due to the weight of the rectangular pipe jacking machine, and enhancing the stability of the support system.
[0040] In one embodiment, the receiving platform is an unexcavated soil platform in the foundation pit, the side surface of the soil platform along the construction direction of the rectangular pipe jacking machine is connected to the diaphragm wall, and the top surface of the soil platform is further provided with a reinforcement layer, the surface of the reinforcement layer matches the rectangular pipe jacking machine receiving port. The platform width of the receiving platform is preferably three times the width of the pipe, facilitating the disassembly and hoisting of the rectangular pipe jacking machine. Before the ring frame beam is erected, C20 concrete is hardened to provide a site for the construction of the ring frame beam with a scaffold, and to act as a bottom fulcrum during pipe construction. For the reinforcement layer, 42 cement slurry is used to grout and reinforce the top surface of the soil platform, with a grouting pressure of 0.8MPa-1MPa. After grouting is completed, it is determined whether the grouting effect meets the grouting standard (whether the 28-day unconfined compressive strength is not less than 1.0MPa and the permeability coefficient is not greater than 1×10 -7 cm / s) by drilling and coring. If the grouting standard cannot be met, supplementary grouting is required.
[0041] As further preferred in the embodiment, the foundation further comprises a slope, which is arranged on the side of the foundation perpendicular to the construction direction of the rectangular jacking machine. The slope surface adopts a spray anchor support to avoid the erosion of rainwater and the weathering of rock-soil mass, which causes the softening of the mechanical parameters of the soil in the pit. The slope comprises a first slope and a second slope, and a buffer platform is arranged between the first slope and the second slope. The slope of the first slope is lower than that of the second slope, and the slope rate of the first slope and the second slope is 1:1.5 to 1:2. The foundation further comprises a plurality of water interception ditches, which are arranged on the top surface of the first slope and the foundation, the first slope and the buffer platform, and the bottom of the second slope, respectively, and the plurality of water interception ditches are interconnected. Through the arrangement of the slope and the water interception ditches, water in the construction process can be discharged from the top of the receiving platform, and water accumulation can be avoided. Moreover, the arrangement of the slope makes the receiving platform not affect the construction process of the lower layer of the receiving platform, and promotes the construction progress.
[0042] The utility model discloses a reserved foundation in the foundation as receiving platform can receive rectangular jacking machine, and can transfer lateral constraint in the process of pipe jacking, ensure the overall stability of foundation, and the servo system adjusts support axial force in support system, and the temporary ring frame beam of integrated casting molding can dynamically adjust the deformation of support in the process of pipe jacking, avoid the torsion of support system, in addition, can provide fulcrum for the upper and lower of the enclosure diaphragm wall, reduce the hole effect of the enclosure diaphragm wall, and reduce stress concentration.
[0043] The above is only the preferred embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process conversion using the contents of the utility model specification and drawings, or direct or indirect application in other related technical fields, are all included in the patent protection range of the utility model.
Claims
1. A structure for receiving and constructing a rectangular pipe jacking machine during the retaining phase, the structure being located within a foundation pit, the foundation pit including a retaining diaphragm wall, characterized in that... The structure includes a receiving platform and an integrated ring frame beam. The height of the receiving platform matches the bottom of the receiving port of the rectangular pipe jacking machine. The ring frame beam is fixedly connected to the retaining underground continuous wall. The ring frame beam includes an upper beam, side beams, and a bottom beam. The top surface of the receiving platform is provided with an embedded groove for fixing the bottom beam. The height of the bottom beam matches the top surface of the receiving platform. It also includes several support members. The support members are axially adjustable support members. The support members are connected to the upper beam and side beams respectively.
2. The structure for receiving and constructing a rectangular pipe jacking machine during the retaining phase, as described in claim 1, is characterized in that... It also includes a connecting plate, which is fixed to the inner end face of the ring frame beam and surrounds the support member and is fixedly connected to the support member.
3. The structure for receiving and constructing a rectangular pipe jacking machine during the retaining phase, as described in claim 2, is characterized in that... The support component is a servo cylinder, one end of which is fixedly connected to the connecting plate, and the other end is fixed to the retaining underground continuous wall.
4. The structure for receiving and constructing a rectangular pipe jacking machine during the retaining phase, as described in claim 1, is characterized in that... The ring frame beam is provided with a constraint hole, the size of which matches the size of the rectangular pipe jacking machine.
5. The structure for receiving and constructing a rectangular pipe jacking machine during the retaining phase, as described in claim 1, is characterized in that... It also includes a post-cast ring beam, wherein the rectangular jacking machine receiving port includes a rectangular jacking pipe, and the post-cast ring beam fills the gap between the ring frame beam and the rectangular jacking pipe.
6. The structure for receiving and constructing a rectangular pipe jacking machine during the retaining phase, as described in claim 1, is characterized in that... It also includes L-shaped steel bars, with ring-shaped steel bars inside the ring frame beam. One end of the L-shaped steel bar is connected to the ring-shaped steel bar, and the other end of the L-shaped steel bar is connected to the main reinforcement bars inside the retaining underground continuous wall.
7. The structure for receiving and constructing a rectangular pipe jacking machine during the retaining phase, as described in claim 1, is characterized in that... The receiving platform is an unexcavated earthen platform within the foundation pit. The side of the earthen platform along the construction direction of the rectangular pipe jacking machine is connected to the retaining underground continuous wall. The top surface of the earthen platform is also provided with a reinforcement layer, the surface of which matches the receiving port of the rectangular pipe jacking machine.
8. The structure for receiving and constructing a rectangular pipe jacking machine during the retaining phase, as described in claim 7, is characterized in that... The earthen platform also includes a slope, which is located on the side of the earthen platform perpendicular to the construction direction of the rectangular pipe jacking machine.
9. The structure for receiving and constructing a rectangular pipe jacking machine during the retaining phase, as described in claim 8, is characterized in that... The slope includes a first slope and a second slope, with a buffer platform between the first slope and the second slope, and the slope of the first slope is lower than that of the second slope.
10. The structure for receiving and constructing a rectangular pipe jacking machine during the retaining phase, as described in claim 9, is characterized in that... The earthen platform also includes multiple intercepting ditches, which are respectively located at the top surface of the first slope and the earthen platform, the bottom of the first slope and the buffer platform, and the bottom of the second slope. The multiple intercepting ditches are interconnected.