Combined deep foundation pit-in-pit prevention and control method for gushing of high confined water stratum and construction method

Abstract

The invention relates to a combined deep foundation pit-in-pit prevention and control method for gushing of a high confined water stratum and a construction method. The construction method comprises the following steps of construction platform erection, pit-in-pit steel bar construction, formwork construction and waterproof coiled material laying. The simple reinforcing steel bar binding jig frame device has the beneficial effects that the simple reinforcing steel bar binding jig frame device is developed, the simple reinforcing steel bar binding jig frame device is composed of bolts, profile steel, plug pin pieces and the like, the binding parameters of a cushion layer reinforcing steel bar mesh can be accurately controlled by moving the distance between the plug pin pieces, and the binding difficulty of the cushion layer reinforcing steel bar mesh is reduced; the hanging platform system is composed of a rail groove, a construction platform, a telescopic hanging rod and the like, the construction platform can move freely in a pit-in-pit space, and the construction difficulty is lowered. The used moving system can also be used for a follow-up coiled material paving frame; and the posture adjustment of the reinforcing mesh during hoisting is realized by moving the clamps, so that the hoisting difficulty is reduced.

Description

Technical Field

[0001] The present invention belongs to the field of pit-in-pit construction methods, and in particular relates to a deep foundation pit-in-pit for combined prevention and control of sudden surges in high-pressure water strata and a construction method thereof. Background Art

[0002] A pit in a pit is a common auxiliary structure of a building structure, such as a water collection well below the base of a station floor, a water collection tank under an escalator at an entrance or exit, and an elevator shaft of a vertical elevator. It is a small pit that is excavated downward after the foundation pit reaches the base, so that a sunken structure can be constructed. As the deepest part of the foundation pit, rainwater and groundwater are easily collected here during the excavation process.

[0003] The following difficulties will be encountered during the construction of deep foundation pits: 1) For ultra-deep pits, traditional personnel need to frequently go up and down ladders to enter the construction site, and the safety of the construction workers cannot be guaranteed; 2) The cushion layer steel mesh is difficult to bind on site and construct the cushion layer formwork due to the small working surface; 3) The small working surface makes it difficult to lay the waterproof membrane.

[0004] In view of this, in order to address a series of problems arising during the construction of deep foundation pits, it is urgent to invent a simple and effective high-pressure water stratum sudden surge combined prevention and control deep foundation pit construction system to improve the efficiency and quality of pit-in-pit construction and reduce safety risks. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a deep foundation pit-in-pit and a construction method for combined prevention and control of sudden surges in high-pressure water strata.

[0006] The construction method of the deep foundation pit in the pit for combined prevention and control of sudden surge in high-pressure water formations comprises the following steps: S1. Construction platform erection; the hanging platform system is extended to the foundation pit through the mobile system; S2. Pit-in-pit reinforcement construction: The cushion layer reinforcement mesh of the pit-in-pit in the foundation pit is constructed with a simple reinforcement tyre frame; S3, formwork construction: install the steel formwork in the pit by pulling up the T-rod and screw rod, and adjust the horizontal position of the channel steel by fine-tuning the jack to pour concrete; S4. Laying of waterproof membrane: installing a membrane spreading frame on the mobile system, and laying the waterproof membrane on the inner wall of the pit through the membrane spreading frame.

[0007] Preferably, the hanging platform system includes a track groove, a construction platform and a telescopic boom, and the mobile system includes a track groove and a mobile rod. The track groove is arranged in the foundation pit, counterweights are arranged at both ends of the track groove, both ends of the mobile rod are arranged on the track groove, the upper end of the telescopic boom is arranged on the track groove, and the construction platform is arranged at the lower end of the telescopic boom.

[0008] Preferably, the simple steel bar binding frame includes bolts, steel sections and latch parts, the steel sections are provided with latch holes, and the latch parts are arranged on the steel sections through the latch holes; four groups of lifting ears are arranged on the cushion steel mesh, one end of the main lifting rope is connected to the lifting ears, and the other end of the main lifting rope is connected to the mobile clamp, and the mobile clamp is arranged on the lifting frame, and the main lifting rod and the lifting frame are connected by the auxiliary lifting rope.

[0009] Preferably, fine-tuning positioning blocks are provided above both sides of the pit in the pit, channel steel is provided between the fine-tuning positioning blocks on both sides, a pull-up T-rod is inserted in the middle of the channel steel, and screws are provided on both sides of the pull-up T-rod; ear plates are provided at the top and bottom of the steel formwork, the pull-up T-rod is connected to the ear plates at the bottom of the steel formwork, and the screws are connected to the ear plates at the top of the steel formwork.

[0010] Preferably, the lower end of the pull-up T-rod is inserted into the ear plate at the lower part of the steel formwork from bottom to top, the upper end of the pull-up T-rod is inserted into the channel steel, the screw is inserted into the ear plate at the upper part of the steel formwork, the free sleeve rod is inserted into the pull-up T-rod, the free sleeve rod is fixed by a long screw, both ends of the channel steel are set on fine-tuning positioning blocks, and fine-tuning jacks are set on the fine-tuning positioning blocks. Concrete pouring is carried out after the formwork construction is completed.

[0011] Preferably, the coil material spreading frame includes a hydraulic telescopic rod, a movable rod and a coil material platform. The coil material spreading frame adopts a mobile system construction. The movable rod is connected to the hydraulic spring rod, the connecting rod is connected to the lower end of the hydraulic spring rod, and movable wheels are respectively arranged at both ends of the connecting rod. The rolling wheels are in contact with the waterproof coil material, and a coil material platform is arranged outside the rolling wheels. The coil material is placed on the coil material platform, and reserved holes are arranged on the coil material platform.

[0012] This high-pressure water stratum sudden inrush combination prevention and control deep foundation pit is obtained by any of the above-mentioned methods.

[0013] The beneficial effects of the present invention are: 1) The present invention develops a simple steel bar binding frame device, which is composed of bolts, steel sections, latch parts, etc. The binding parameters of the cushion layer steel mesh can be accurately controlled by moving the spacing of the latch parts, thereby reducing the difficulty of binding the cushion layer steel mesh.

[0014] 2) The present invention has developed a pit-in-pit hanging platform system, which consists of a track groove, a construction platform, a telescopic hanger, etc., which realizes the arbitrary movement of the construction platform in the pit-in-pit space and reduces the construction difficulty; the mobile system used can also be used for the subsequent use of the coiled material paving frame.

[0015] 3) The present invention proposes a technology for hoisting the cushion reinforcement into the pit outside the pit. The posture adjustment of the steel mesh during hoisting is achieved through mobile clamping, which reduces the difficulty of hoisting.

[0016] 4) The present invention proposes a standardized formwork concrete pouring technology, which adopts the form of hanging steel formwork to solve the difficulty of installing the foundation pit formwork in a narrow space, reduce the construction difficulty, and speed up the construction progress.

[0017] 5) The present invention has developed a coil material spreading frame, which is composed of a hydraulic telescopic rod, a moving rod, a coil material platform, etc. The cooperation of the hydraulic telescopic rod and the moving wheel makes the coil material fit with the foundation pit surface, realizing intelligent coil material spreading operation and accelerating the construction progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a pit-in-pit system of the present invention; Figure 2 This is a schematic diagram of a simple steel bar binding frame device; Figure 3 It is a cross-sectional diagram of the hoisting platform system in the pit; Figure 4 It is a top view schematic diagram of the pit-in-pit hanging platform system; Figure 5 This is a schematic diagram of the cushion reinforcement being tied outside the pit and hoisted into the pit as a whole; Figure 6 This is a schematic diagram of concrete pouring with standardized formwork Figure 7 Schematic diagram of fine-tuning positioning block; Figure 8 Schematic diagram of coil spreading frame; Fig. 9 Schematic diagram of the coil platform.

[0019] Explanation of the reference numerals: 1-foundation pit, 2-pit in pit, 3-bolt, 4-pin hole, 5-pin piece, 6-simple steel bar binding frame, 7-lifting ear, 8-cushion steel mesh, 9-main lifting rope, 10-auxiliary lifting rope, 11-main lifting rod, 12-lifting frame, 13-mobile clamping hoist, 14-construction platform, 15-telescopic lifting rod, 16-track groove, 17-counterweight block, 18-cushion, 19-moving rod, 20-waterproof membrane, 21-movable Wheel, 22-coil platform, 23-coil, 24-outer cover, 25-hydraulic spring rod, 26-steel formwork, 27-ear plate, 28-upper pull T rod, 29-upper pull rod, 30-fine-tuning positioning block, 31-free sleeve rod, 32-channel steel, 33-fine-tuning jack, 34-coil spreading frame, 35-steel, 36-hanging platform system, 37-screw, 38-long screw, 39-reserved hole, 40-connecting rod, 41-mobile system. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with embodiments. The description of the following embodiments is only used to help understand the present invention. It should be noted that for ordinary persons in the art, without departing from the principle of the present invention, the present invention can also be modified in some ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0021] Embodiment 1 As an example, Figures 1 to 9 As shown, the construction method of the deep foundation pit with combined prevention and control of sudden surge in high-pressure water formations includes the following steps: S1, construction platform erection; hanging platform system 36 extends to foundation pit 1 through mobile system 41; Figure 3 and Figure 4 As shown, the hanging platform system 36 is composed of a track groove 26, a construction platform 14, a telescopic boom 15, etc., and the moving system 41 is composed of a track groove 16, a moving rod 19, etc. The track groove 26 is set in the foundation pit 1, counterweight blocks 17 are set at both ends of the track groove 26, both ends of the moving rod 19 are set on the track groove 16, the upper end of the telescopic boom 15 is set on the track groove 16, and the construction platform 14 is set at the lower end of the telescopic boom 15.

[0022] S2, pit-in-pit reinforcement construction; the cushion layer reinforcement mesh 8 of the pit-in-pit 2 in the foundation pit 1 is constructed by using a simple reinforcement tyre 6; S3, template construction; the channel steel 32 is installed in the pit 2 by pulling up the T rod 28 and the screw 37, and the horizontal position of the channel steel 32 is adjusted by the fine-tuning jack 33 to pour concrete; S4, laying of waterproofing membrane; installing a membrane spreading frame 34 on the mobile system 41, and laying the waterproofing membrane 20 on the inner wall of the pit 2 through the membrane spreading frame 34.

[0023] Embodiment 2 As another embodiment, this embodiment 2 proposes, on the basis of the embodiment 1, a more specific construction method for a deep foundation pit in a pit for combined prevention and control of sudden surge in high-pressure water formations: In step S2, Figure 1 and Figure 2 As shown, the cushion steel mesh 8 of the pit-in-pit 2 in the foundation pit 1 is constructed by a simple steel bar binding frame 6, which is composed of bolts 3, steel sections 35, latches 5, etc. The steel sections 35 are provided with latch holes 4, and the latches 5 are arranged on the steel sections 35 through the latch holes 4. Four sets of lifting ears 7 are arranged on the cushion steel mesh 8, one end of the main lifting rope 9 is connected to the lifting ears 7, and the other end of the main lifting rope 9 is connected to the mobile clamp 13, which is arranged on the hanging frame 12, and the main hanging rod 11 and the hanging frame 12 are connected by auxiliary hanging ropes.

[0024] In step S3, Figure 6and Figure 7 As shown, after the construction of the cushion layer steel mesh 8 is completed, the steel formwork 26 is installed, and an ear plate 27 is arranged on the steel formwork 26. The lower end of the upper pull-up T rod 28 is inserted into the ear plate 27 at the lower part of the steel formwork 26 from bottom to top, and the upper end of the upper pull-up T rod 28 is inserted into the channel steel 32. The screw 37 is inserted into the ear plate 27 at the upper part of the steel formwork 26. The free sleeve rod 31 is inserted into the upper pull-up T rod 28, and the free sleeve rod 31 is fixed by a long screw 38. Both ends of the channel steel 32 are arranged on the fine-tuning positioning block 30, and the fine-tuning jack 33 is arranged on the fine-tuning positioning block 30. After the formwork construction is completed, concrete pouring is carried out.

[0025] like Figure 5 As shown, four groups of lifting ears 7 are arranged on the cushion layer steel mesh 8, one end of the main lifting rope 9 is connected to the lifting ear 7, and the other end of the main lifting rope 9 is connected to the mobile clamp 13, and the mobile clamp 13 is arranged on the lifting frame 12, and the main lifting rod 11 and the lifting frame 12 are connected by an auxiliary lifting rope.

[0026] It should be noted that the parts in this embodiment that are the same or similar to those in the first embodiment can be referenced to each other and will not be described in detail in this application.

[0027] Embodiment 3 As another embodiment, this embodiment 3 proposes, on the basis of embodiments 1 and 2, a more specific construction method for a deep foundation pit in a pit for combined prevention and control of sudden surge in high-pressure water formations: In step S4, Figure 8 and Fig. 9 As shown, the coil material spreading frame 34 is composed of a hydraulic telescopic rod 25, a moving rod 19, a coil material platform 22, etc. The coil material spreading frame 34 is constructed using a moving system 41. The moving rod 19 is connected to the hydraulic spring rod 25. The connecting rod 41 is connected to the lower end of the hydraulic spring rod 25. Moving wheels 21 are respectively arranged at both ends of the connecting rod 41. The rolling wheels 21 are close to the waterproof coil material 20. The coil material platform 22 is arranged outside the rolling wheels 21. The coil material 23 is placed on the coil material platform 22. A reserved hole 39 is arranged on the coil material platform 22.

[0028] It should be noted that the parts in this embodiment that are the same or similar to those in Embodiments 1 and 2 can be referenced to each other and will not be described in detail in this application.

[0029] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

Claims

1. A construction method for a deep foundation pit in a pit for combined prevention and control of sudden surges in high-pressure water formations, characterized in that: The following steps are involved: S1. Construction platform erection; the hanging platform system is extended to the foundation pit through the mobile system; S2. Pit-in-pit reinforcement construction: The cushion layer reinforcement mesh of the pit-in-pit in the foundation pit is constructed with a simple reinforcement tyre frame; S3, formwork construction: install the steel formwork in the pit by pulling up the T-rod and screw rod, and adjust the horizontal position of the channel steel by fine-tuning the jack to pour concrete; S4. Laying of waterproof membrane: installing a membrane spreading frame on the mobile system, and laying the waterproof membrane on the inner wall of the pit through the membrane spreading frame.

2. The construction method of a deep foundation pit for combined prevention and control of sudden surge in high-pressure water formations according to claim 1 is characterized in that: The hanging platform system includes a track groove, a construction platform and a telescopic boom. The mobile system includes a track groove and a mobile rod. The track groove is set in the foundation pit, counterweights are set at both ends of the track groove, both ends of the mobile rod are set on the track groove, the upper end of the telescopic boom is set on the track groove, and the construction platform is set at the lower end of the telescopic boom.

3. The construction method of a deep foundation pit for combined prevention and control of sudden surge in high-pressure water formations according to claim 1 is characterized in that: The simple steel bar binding frame includes bolts, steel sections and latch parts. The steel sections are provided with latch holes, and the latch parts are set on the steel sections through the latch holes. Four groups of lifting ears are set on the cushion steel mesh. One end of the main lifting rope is connected to the lifting ears, and the other end of the main lifting rope is connected to the mobile clamp. The mobile clamp is set on the lifting frame, and the main lifting rod and the lifting frame are connected by an auxiliary lifting rope.

4. The construction method of a deep foundation pit for combined prevention and control of sudden surge in high-pressure water formations according to claim 1 is characterized in that: Fine-tuning positioning blocks are arranged above both sides of the pit in the pit, channel steel is arranged between the fine-tuning positioning blocks on both sides, a pull-up T-rod is inserted in the middle of the channel steel, and screws are arranged on both sides of the pull-up T-rod; ear plates are arranged at the top and bottom of the steel formwork, the pull-up T-rod is connected to the ear plates at the bottom of the steel formwork, and the screws are connected to the ear plates at the top of the steel formwork.

5. The construction method of a deep foundation pit for combined prevention and control of sudden surge in high-pressure water formations according to claim 4 is characterized in that: The lower end of the pull-up T-rod is inserted into the ear plate at the lower part of the steel formwork from bottom to top, the upper end of the pull-up T-rod is inserted into the channel steel, the screw is inserted into the ear plate at the upper part of the steel formwork, the free sleeve rod is inserted into the pull-up T-rod, and the free sleeve rod is fixed by a long screw. Both ends of the channel steel are set on fine-tuning positioning blocks, and fine-tuning jacks are set on the fine-tuning positioning blocks. Concrete pouring is carried out after the formwork construction is completed.

6. The construction method of a deep foundation pit for combined prevention and control of sudden surge in high-pressure water formations according to claim 1 is characterized in that: The roll material spreading frame includes a hydraulic telescopic rod, a mobile rod and a roll material platform. The roll material spreading frame adopts a mobile system construction. The mobile rod is connected to the hydraulic spring rod, the connecting rod is connected to the lower end of the hydraulic spring rod, and moving wheels are respectively arranged at both ends of the connecting rod. The rolling wheels are fitted with the waterproof roll material, and a roll material platform is arranged outside the rolling wheels. The roll material is placed on the roll material platform, and reserved holes are arranged on the roll material platform.

7. A deep foundation pit in a pit for combined prevention and control of sudden surges in high-pressure water formations, characterized in that: Obtained by the method according to any one of claims 1 to 6.

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