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CN-117005424-B - Underground diaphragm wall supporting structure based on row pile supporting system and construction method thereof

CN117005424BCN 117005424 BCN117005424 BCN 117005424BCN-117005424-B

Abstract

The invention relates to the technical field of foundation pit support and discloses an underground diaphragm wall support structure based on a row pile support system and a construction method thereof, wherein a fixed row pile, a concrete diaphragm wall and a reinforcing anchor rope are all arranged in foundation soil, the concrete diaphragm wall is arranged on one side of the concrete diaphragm wall, a reinforcing row pile is arranged on one side of the foundation soil, an anchor rope connecting plate is arranged on the front side of the concrete diaphragm wall, the reinforcing anchor rope is connected between the concrete diaphragm wall and the reinforcing anchor rope through the anchor rope connecting plate, when the foundation pit side is supported and reinforced, the reinforcing structure is formed by the reinforcing row pile and the reinforcing anchor rope, the lateral supporting force of the concrete diaphragm wall is improved, the inner space of the foundation pit is not occupied, the construction operation in the foundation pit is facilitated, the construction cost is low, when the foundation pit on the old building side is supported and reinforced, the foundation on the old building side can be supported and reinforced through the reinforcing row pile, and the foundation of the old building can be effectively prevented from being shifted and settled.

Inventors

  • SHEN QINQIN
  • CHEN LI

Assignees

  • 浙江岩科建设有限公司

Dates

Publication Date
20260512
Application Date
20230804

Claims (7)

  1. 1. The construction method of the underground diaphragm wall supporting structure based on the row pile supporting system comprises a supporting mechanism for supporting a foundation pit (2), wherein the supporting mechanism comprises reinforcing row piles (3), concrete diaphragm walls (4) and reinforcing anchor cables (5); The foundation pit is characterized in that foundation soil (1) is arranged outside the foundation pit (2), reinforcing row piles (3), concrete continuous walls (4) and reinforcing anchor cables (5) are arranged inside the foundation soil (1), the concrete continuous walls (4) are arranged on one side of the foundation pit (2), the reinforcing row piles (3) are arranged on one side of the concrete continuous walls (4), anchor cable connecting plates (6) are arranged on the front sides of the concrete continuous walls (4), and the reinforcing anchor cables (5) are connected between the concrete continuous walls (4) and the reinforcing row piles (3) through the anchor cable connecting plates (6); The middle part of anchor rope connecting plate (6) is provided with even board caulking groove (10), the inboard of even board caulking groove (10) is provided with anchor rope even board (11), anchor rope even board (11) activity gomphosis is in the inboard of even board caulking groove (10), anchor rope connecting hole (12) have evenly been seted up to the inboard of even board caulking groove (10), anchor rope even board (11) are corresponding with anchor rope connecting hole (12) quantity, fastening screw (13) have been seted up at the middle part of anchor rope even board (11), the tip of consolidate anchor rope (5) is fixed with the fastening double-screw bolt, the activity of fastening double-screw bolt is run through in anchor rope connecting plate (6) and anchor rope even board (11), the upper portion threaded connection of fastening double-screw bolt has fastening nut, consolidate anchor rope (5) and be connected with anchor rope connecting plate (6) stationary phase through fastening nut, its characterized in that includes: s1, positioning row piles, namely positioning the number of the reinforced row piles (3) and the distance between the reinforced row piles and the concrete continuous wall (4) according to the scale of a foundation pit (2), and determining the positions of the reinforced row piles (3) according to the height of a old building (7) and a foundation structure when the reinforced row piles are used for reinforcing the foundation of the old building (7) so as to ensure the reinforcing strength of the reinforced row piles (3); S2, pile arranging pouring, namely when the reinforced pile arranging (3) is constructed, excavating pile arranging holes in the upper part of foundation soil (1) according to positioning information, wherein the depth of each pile hole is larger than that of a foundation pit (2), then placing a reinforcement cage in the pile arranging holes through hoisting equipment, ensuring that the installation direction of the reinforcement cage is consistent with the design when the reinforcement cage is hoisted and placed, filling and pouring concrete after the reinforcement pile arranging (3) is completed; S3, constructing a continuous wall, namely firstly excavating an installation groove according to the upper part of the foundation soil (1) positioned on the side of the foundation pit (2) when constructing the concrete continuous wall (4), after the concrete on the reinforcing layer on the upper part of the installation groove is poured, excavating a foundation groove on the lower side after the concrete is solidified, wherein the depth of the foundation groove is larger than that of the foundation pit (2), placing a reinforcement cage in the foundation groove through hoisting equipment after the construction is completed, and then pouring the concrete continuous wall (4), thereby completing the pouring construction of the concrete continuous wall (4); S4, excavating the foundation pit, namely excavating the foundation pit (2) layer by layer according to the boundary of the foundation pit (2) to be excavated in the building part after the concrete continuous wall (4) is solidified, and completing the excavation construction of the foundation pit (2); S5, anchor rope reinforcement, after the foundation pit excavation construction is completed, the outside of the concrete continuous wall (4) is cleaned, then lateral perforation is carried out on the upper portion of the concrete continuous wall (4), the perforated position corresponds to the distribution position of the reinforced row piles (3), afterwards, the end portions of the reinforced anchor ropes (5) are connected with the reinforced row piles (3) through the perforation, the reinforced row piles (3) serve as fixed anchor points of the reinforced anchor ropes (5), afterwards, the anchor rope connecting plates (6) are installed and fixed according to the positions of the reinforced anchor ropes (5), anchor rope connecting plates (11) on the upper portions of the anchor rope connecting plates (6) are matched through fastening studs at the end portions of the reinforced anchor ropes (5), the reinforced anchor ropes (5) are fixedly connected with the anchor rope connecting plates (6), the connection and the fixed of the reinforced anchor ropes (5) are completed, and the foundation pit (2) can be supported only by means of the reinforced row piles (3) and the concrete continuous wall (4) when the foundation is used for reinforcing of old buildings (7).
  2. 2. The construction method of the underground diaphragm wall supporting structure based on the row pile supporting system of claim 1, wherein the side surface of the foundation pit (2) is free of buildings, the concrete diaphragm wall (4) is fixedly arranged on one side of the interior of the foundation pit (2), and the reinforced row piles (3) are arranged on the outer side of the concrete diaphragm wall (4).
  3. 3. The construction method of the underground diaphragm wall supporting structure based on the row pile supporting system of claim 1, wherein a plurality of reinforcing row piles (3) are arranged, the reinforcing row piles (3) and the concrete diaphragm wall (4) are distributed at fixed intervals, and the reinforcing row piles (3) are distributed at fixed intervals.
  4. 4. The construction method of the underground diaphragm wall supporting structure based on the row pile supporting system of claim 1, wherein the reinforcing anchor cables (5) are longitudinally arranged on one side of the reinforcing row piles (3) at specific intervals, one ends of the reinforcing anchor cables (5) are fixedly connected with the reinforcing row piles (3), and the other ends of the reinforcing anchor cables (5) are fixedly connected with the concrete diaphragm wall (4) through anchor cable connecting plates (6).
  5. 5. The construction method of the underground diaphragm wall supporting structure based on the row pile supporting system of claim 1, wherein the front edge side of the anchor rope connecting plate (6) is uniformly provided with fixing screw holes (8), fixing bolts (9) are arranged in the fixing screw holes (8), the fixing bolts (9) penetrate through the anchor rope connecting plate (6) through the fixing screw holes (8) and are in threaded connection with the inner sides of screw holes formed in the side faces of the foundation pit (2), and the anchor rope connecting plate (6) is fixedly connected with the inner sides of the foundation pit (2) through the fixing bolts (9).
  6. 6. The construction method of the underground diaphragm wall supporting structure based on the row pile supporting system according to claim 1, wherein old buildings (7) are arranged on the side surfaces of the foundation pit (2), the concrete diaphragm wall (4) is fixedly supported on one side of the interior of the foundation pit (2), the reinforcing row piles (3) are arranged on the outer side of the concrete diaphragm wall (4), and the reinforcing row piles (3) are arranged between the old buildings (7) and the concrete diaphragm wall (4).
  7. 7. The construction method of the underground diaphragm wall supporting structure based on the row pile supporting system according to claim 1, wherein the reinforcing row piles (3) are fixed in the foundation soil (1), the reinforcing row piles (3) are provided with a plurality of reinforcing row piles (3), and the reinforcing row piles (3) are fixedly arranged between the old building (7) and the concrete diaphragm wall (4) in an staggered mode.

Description

Underground diaphragm wall supporting structure based on row pile supporting system and construction method thereof Technical Field The invention relates to the technical field of foundation pit support, in particular to an underground diaphragm wall support structure based on a row pile support system and a construction method thereof. Background With the development of national economy and the acceleration of urban construction pace, a great number of foundation pit projects appear, foundation pit supports are measures for protecting the construction of an underground main structure and the surrounding environment of a foundation pit, temporary supporting, reinforcing, protecting and controlling groundwater are adopted for the foundation pit, the existing foundation pit supports mostly adopt a continuous wall type foundation pit support structure, narrow and deep grooves are dug underground, proper materials are poured into the grooves to form a continuous underground wall with seepage prevention, soil retaining and bearing functions, prefabricated members are inserted and cast-in-place concrete is adopted between the members to connect the prefabricated members into a complete wall, the complete wall is used as a soil retaining structure to prevent soil outside the side wall of the foundation pit from moving into the foundation pit and is used as a waterproof curtain to prevent water outside the side wall of the foundation pit from flowing into the foundation pit, and the underground wall can be used as a building outer wall to bear vertical force. When the foundation pit with longer span is supported, only the supporting strength of the continuous wall is insufficient for stably supporting the side of the foundation pit, a supporting structure is additionally arranged on one side of the continuous wall, the supporting structure is arranged on the inner side of the foundation pit and occupies a certain installation space, so that the construction operation in the foundation pit is influenced to a certain extent, the installation space of the supporting structure and the fixed base of the supporting structure are reserved when the foundation pit is excavated, the construction cost and the difficulty of the foundation pit are increased, old buildings are densely distributed on the periphery of the foundation pit construction due to the tension of urban land, when the side of the foundation pit is relatively close to the old buildings, the foundation structure of the old buildings is easily influenced when the continuous wall is excavated, the foundation of the old buildings is settled, and the whole foundation of the old buildings is cracked when serious, so that the original building structure is cracked or inclined. Disclosure of Invention The invention aims to provide an underground diaphragm wall supporting structure based on a row pile supporting system and a construction method thereof, so as to solve the problems in the background technology. In order to achieve the aim, the invention provides the technical scheme that the underground diaphragm wall supporting structure based on the row pile supporting system comprises a supporting mechanism for supporting a foundation pit, wherein the supporting mechanism comprises reinforcing row piles, a concrete diaphragm wall and reinforcing anchor cables; The foundation pit is characterized in that foundation soil is arranged outside the foundation pit, reinforcing row piles, concrete continuous walls and reinforcing anchor ropes are arranged inside the foundation soil, the concrete continuous walls are arranged on one side of the concrete continuous walls, the reinforcing row piles are arranged on one side of the foundation soil, anchor rope connecting plates are arranged on the front sides of the concrete continuous walls, and the reinforcing anchor ropes are connected between the concrete continuous walls and the reinforcing row piles through the anchor rope connecting plates. Preferably, the side surface of the foundation pit is free of building, the concrete continuous wall is fixedly arranged on one side of the interior of the foundation pit, and the reinforcing row piles are arranged on the outer side of the concrete continuous wall. Preferably, the reinforcing row piles are arranged in a plurality, the reinforcing row piles and the concrete continuous wall are distributed at fixed intervals, and the reinforcing row piles are distributed at fixed intervals. Preferably, the reinforcement anchor cable is longitudinally arranged at one side of the reinforcement row pile at a specific interval, one end of the reinforcement anchor cable is fixedly connected with the reinforcement row pile, and the other end of the reinforcement anchor cable is fixedly connected with the concrete continuous wall through an anchor cable connecting plate. Preferably, the front edge side of the anchor cable connecting plate is uniformly provided with fixing screw holes, fixing b